-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 PgDu4uT/neqUTVwkcFLP/nqR33ZoKAgfQT+hZxWv9l4onEV00+0B8FE34/bVW7JV
 AQ3a4w5SFYJTiZwTbbibRg==

<SEC-DOCUMENT>0000930413-05-005288.txt : 20050726
<SEC-HEADER>0000930413-05-005288.hdr.sgml : 20050726
<ACCEPTANCE-DATETIME>20050726132736
ACCESSION NUMBER:		0000930413-05-005288
CONFORMED SUBMISSION TYPE:	N-Q
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20050531
FILED AS OF DATE:		20050726
DATE AS OF CHANGE:		20050726
EFFECTIVENESS DATE:		20050726

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK INSURED MUNICIPAL INCOME TRUST
		CENTRAL INDEX KEY:			0001181187
		IRS NUMBER:				816105962
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0831

	FILING VALUES:
		FORM TYPE:		N-Q
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-21178
		FILM NUMBER:		05973588

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		888-825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK MUNICIPAL INCOME TRUST III
		DATE OF NAME CHANGE:	20020819
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-Q
<SEQUENCE>1
<FILENAME>c38260_nq.htm
<TEXT>
<HTML>
<HEAD>
<TITLE></TITLE>
</HEAD>
<BODY>

<P align="center">
<FONT face="serif">UNITED STATES<br>
SECURITIES AND EXCHANGE COMMISSION<br>
Washington, D.C. 20549 </FONT></P>
<P align="center">
<B><FONT size=4 face="serif">FORM N-Q </FONT></B></P>
<P align="center">
<B><FONT face="serif">QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED<br>
MANAGEMENT INVESTMENT COMPANY </FONT></B></P>
<P align="center">
<FONT face="serif">Investment Company Act file number:__</FONT><U><FONT face="serif">811-21178</FONT></U><FONT face="serif">______ </FONT></P>
<P align="center">
<FONT face="serif">_______</FONT><U><FONT face="serif">BlackRock Insured Municipal Income Trust</FONT></U><FONT face="serif">_______<BR> (Exact name of registrant as specified in charter) </FONT></P>
<TABLE border=0 cellspacing=0 cellpadding=0 width=100%>
<TR valign="bottom">
	<TD width=50% align=center>
<FONT face="serif">100 Bellevue Parkway, Wilmington, DE</FONT>&nbsp;
	</TD>
	<TD width=25%>&nbsp;
	</TD>
	<TD width=25% align=center>
<FONT face="serif">19809</FONT>&nbsp;
	</TD>
</TR>
<TR>
	<TD>
<HR noshade size=1>
	</TD>
	<TD><HR noshade size=1>
	</TD>
	<TD>
<HR noshade size=1>
	</TD>
</TR>
<TR valign="bottom">
	<TD width=50% align=right>
      <center>
        <FONT face="serif">(Address of principal executive offices)</FONT>&nbsp;
	    </center></TD>
	<TD width=25%>&nbsp;
	</TD>
	<TD width=25% align=right>
      <center>
        <FONT face="serif">(Zip code)</FONT>&nbsp;
	    </center></TD>
</TR>
</TABLE><BR>
<P align="center">
<FONT face="serif"> Robert S. Kapito, President</font></p><FONT face="serif">

<p align="center"><FONT face="sans-serif"><font size=3><B>BlackRock Insured Municipal Income Trust</B></FONT></font></P><FONT face="sans-serif">
<P align="center">
<FONT face="serif">_______</FONT><U><FONT face="serif">40 East 52nd Street, New
York, NY 10022</FONT></U><FONT face="serif">_______<BR>
(Name and address of agent for service)</FONT></P>
<FONT face="serif"> </FONT><FONT face="serif">Registrant's telephone number, including area code:_</FONT><U><FONT face="serif">888-825-2257</FONT></U><FONT face="serif">__________________ </FONT>
<P>
<FONT face="serif">Date of fiscal year end:___</FONT><U><FONT face="serif">August 31, 2005</FONT></U><FONT face="serif"> </FONT></P>
<P>
<FONT face="serif">Date of reporting period:__</FONT><U><FONT face="serif">May 31, 2005</FONT></U><FONT face="serif">_________________________________</FONT></P>

<HR noshade  width="100%" size=4>

<P align="left" style="page-break-before:always"></P><PAGE>
<A name="page_2"></A>

<P>
<B><FONT face="serif">Item 1. Schedule of Investments.</FONT></B><FONT face="serif"> </FONT></P>
<P>
<FONT face="serif">The registrant&#146;s unaudited schedule of investments as of the close of the reporting period pursuant to Rule 30b1-5 under the Investment Company Act of 1940 is as follows: </FONT></P>
<BR>

<table width="100%"  border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><font size="3"><b>PORTFOLIO OF INVESTMENTS</b></font></td>
  </tr>
  <tr>
    <td><font size="3"><b>MAY 31, 2005 (U</b><b>naudited)</b></font></td>
  </tr>
  <tr>
    <td><hr noshade size=1></td>
  </tr>
  <tr>
    <td><font size="3"><b>BlackRock Insured Municipal Income Trust (BYM)</b></font></td>
  </tr>
  <tr>
    <td><hr noshade size=1></td>
  </tr>
</table>
<p><table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr valign=top>
    <td width="8%" align=center></td>
    <td width="1%">&nbsp;</td>
    <td width="10%" align=center><font size="2"><b>Principal</b></font></td>
    <td width="3%">&nbsp;</td>
    <td width="57%" align=center><font size="2"><b>&nbsp;</b></font></td>
    <td width="11%" align=center></td>
    <td width="1%">&nbsp;</td>
    <td width="8%">&nbsp;</td>
    <td width="1%">&nbsp;</td>
  </tr>
  <tr valign=top bgcolor='#DDDDDD'>
    <td align=center><font size="2"><b>&nbsp;</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Amount</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>&nbsp;</b></font></td>
    <td align=center><font size="2"><b>Option Call</b></font></td>
    <td>&nbsp;</td>
    <td align=center></td>
    <td>&nbsp;</td>
  </tr>
  <tr valign=top>
    <td align=center><font size="2"><b>Rating</b><sup><b>1</b></sup></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>(000)</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Description</b></font></td>
    <td align=center><font size="2"><b>Provisions</b><sup><b>2</b></sup></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Value</b></font></td>
    <td>&nbsp;</td>
  </tr>
  <tr valign=top>
    <td COLSPAN='9' ><HR noshade size=2>
  <tr valign=top><td align=center></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>LONG-TERM INVESTMENTS&#151;149.5%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>California&#151;37.5%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">California St.,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">$ 5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.00%, 2/01/32, MBIA</font></td>
<td align=center><font size="2">08/13 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">$&nbsp; 5,266,600 </font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.00%, 3/01/33</font></td>
<td align=center><font size="2">03/15 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,284,050</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">14,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Dept. of Wtr. Res., Pwr. Sply. Rev.,
Ser. A, 5.375%, 5/01/22</font></td>
<td align=center><font size="2">05/12 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">15,222,900</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Golden St. Tobacco Sec. Corp.,</font></td>
<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">BBB</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A-1, 6.625%, 6/01/40</font></td>
<td align=center><font size="2">06/13 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,981,520</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">BBB</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">14,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A-1, 6.75%, 6/01/39</font></td>
<td align=center><font size="2">06/13 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">15,788,325</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">22,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. B, 5.00%, 6/01/43, FSA</font></td>
<td align=center><font size="2">06/13 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">23,312,475</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">12,100</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Infrastructure &amp; Econ. Dev.,
Bay Area Toll Brdgs., Ser. A, 5.00%, 7/01/36, AMBAC</font></td>
<td align=center><font size="2">07/13 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">12,773,849</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">17,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Met. Wtr. Dist. So. California, Ser.
B-1, 5.00%, 10/01/33, FGIC</font></td>
<td align=center><font size="2">10/13 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">18,499,425</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Sacramento Cnty. San. Dist. Fin.
Auth., Sacramento Regl. Cnty. San., Ser. A,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.00%, 12/01/35, AMBAC</font></td>
<td align=center><font size="2">12/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,318,600</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">15,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">San Francisco City &amp; Cnty. Pub.
Utils. Comm., Wtr. Rev., Ser. A, <br>
&nbsp; &nbsp; &nbsp; 5.00%, 11/01/31, FSA</font></td>
<td align=center valign="bottom"><font size="2">11/11 @ 100</font></td>
<td valign="bottom">&nbsp;</td>
<td align=right valign="bottom"><font size="2">15,659,250</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">53,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">San Joaquin Hills Transp. Corridor
Agcy., Toll Road Rev., Ser. A, Zero Coupon,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 1/15/31, MBIA</font></td>
<td align=center><font size="2">No Opt. Call</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">14,735,060</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,910</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Univ. of California, Ser. O, 5.00%,
9/01/28, FGIC</font></td>
<td align=center><font size="2">09/10 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">11,451,354</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">150,293,408</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>District of Columbia&#151;2.5%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">BBB</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Tobacco Settlement Fin. Corp., 6.75%,
5/15/40</font></td>
<td align=center><font size="2">05/11 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,202,240</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Florida&#151;6.5%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">AAA</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">24,700</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Orlando &amp; Orange Cnty. Expwy.
Auth., Florida Expwy. Rev., Ser. B, <br>
&nbsp; &nbsp; &nbsp; 5.00%, 7/01/35, AMBAC</font></td>
<td align=center valign="bottom"><font size="2">07/13 @ 100</font></td>
<td valign="bottom">&nbsp;</td>
<td align=right valign="bottom"><font size="2">25,989,093</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Georgia&#151;8.2%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Atlanta Arpt. Passenger Fac., FSA,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,950</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. C, 5.00%, 1/01/33</font></td>
<td align=center><font size="2">07/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,177,651</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. J, 5.00%, 1/01/34</font></td>
<td align=center><font size="2">01/15 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,614,125</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Atlanta Wtr. &amp; Wstwtr.,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.00%, 11/01/34, FSA</font></td>
<td align=center><font size="2">11/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,118,460</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,235</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.00%, 11/01/37, FSA</font></td>
<td align=center><font size="2">11/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,418,910</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,555</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 11/01/38, FGIC</font></td>
<td align=center><font size="2">05/09 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,866,970</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">Baa3</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">De Kalb Cnty. Dev. Auth., PCR, General
Mtrs. Corp. Proj., 6.00%, 3/15/21</font></td>
<td align=center><font size="2">12/12 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,662,800</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">32,858,916</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Illinois&#151;15.2%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Chicago, GO,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">13,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 1/01/34, FSA</font></td>
<td align=center><font size="2">01/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">13,608,660</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">7,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 1/01/34, MBIA</font></td>
<td align=center><font size="2">01/13 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">7,295,400</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">11,550<sup> </sup></font></td>
<td><font size="2"><sup>3</sup></font></td>
<td align=left><font size="2">Chicago Spec. Transp., 5.25%, 1/01/31,
AMBAC</font></td>
<td align=center><font size="2">N/A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">12,403,198</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Met. Pier &amp; Exposition Auth.,
Ded. St. Tax Rev., McCormick Place <br>
&nbsp; &nbsp; &nbsp; Expansion Proj., MBIA,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">18,835</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 12/15/28</font></td>
<td align=center><font size="2">06/12 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">19,761,494</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">15,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. B, Zero Coupon, 6/15/28</font></td>
<td align=center><font size="2">No Opt. Call</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,133,300</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,400</font></td>
<td><font size="2"><sup> 4</sup></font></td>
<td align=left><font size="2">O'Hare Intl. Arpt., Ser. A, 5.00%,
1/01/30, MBIA</font></td>
<td align=center><font size="2">01/15 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,515,296</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">60,717,348</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Massachusetts&#151;8.1%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Tpke. Auth., Met. Hwy. Sys. Rev.,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,195</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 1/01/37, MBIA</font></td>
<td align=center><font size="2">01/07 @ 102</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,269,652</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">24,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 1/01/39, AMBAC</font></td>
<td align=center><font size="2">01/09 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">24,761,040</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Wtr. Res. Auth., Ser. B, 5.00%, 8/01/35,
MBIA</font></td>
<td align=center><font size="2">08/17 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,338,250</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">32,368,942</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Michigan&#151;1.3%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">AAA</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Detroit City Sch. Dist., GO, Ser.
A, 5.125%, 5/01/31, FSA</font></td>
<td align=center><font size="2">05/12 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,271,700</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Nevada&#151;7.2%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">AAA</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Reno Transp. Proj., 5.125%, 6/01/32,
AMBAC</font></td>
<td align=center><font size="2">06/12 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,318,480</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Truckee Meadows Wtr. Auth., Ser.
A, FSA,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.00%, 7/01/25</font></td>
<td align=center><font size="2">07/11 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,474,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.125%, 7/01/30</font></td>
<td align=center><font size="2">07/11 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,847,880</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.25%, 7/01/34</font></td>
<td align=center><font size="2">07/11 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,295,350</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">28,935,710</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></table>
<p><p align='center'>1<HR noshade size=4><PAGE><p>
<table width="100%"  border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><hr noshade size=1></td>
  </tr>
  <tr>
    <td><font size="3"><b>BlackRock Insured Municipal Income Trust (BYM) (continued)</b></font></td>
  </tr>
  <tr>
    <td><hr noshade size=1></td>
  </tr>
</table>
<p><table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr valign=top>
    <td width="8%" align=center></td>
    <td width="1%">&nbsp;</td>
    <td width="10%" align=center><font size="2"><b>Principal</b></font></td>
    <td width="3%">&nbsp;</td>
    <td width="56%" align=center><font size="2"><b>&nbsp;</b></font></td>
    <td width="11%" align=center></td>
    <td width="0%">&nbsp;</td>
    <td width="10%">&nbsp;</td>
    <td width="1%">&nbsp;</td>
  </tr>
  <tr valign=top bgcolor='#DDDDDD'>
    <td align=center><font size="2"><b>&nbsp;</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Amount</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>&nbsp;</b></font></td>
    <td align=center><font size="2"><b>Option Call</b></font></td>
    <td>&nbsp;</td>
    <td align=center></td>
    <td>&nbsp;</td>
  </tr>
  <tr valign=top>
    <td align=center><font size="2"><b>Rating</b><sup><b>1</b></sup></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>(000)</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Description</b></font></td>
    <td align=center><font size="2"><b>Provisions</b><sup><b>2</b></sup></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Value</b></font></td>
    <td>&nbsp;</td>
  </tr>
  <tr valign=top>
    <td COLSPAN='9' ><HR noshade size=2>
  <tr valign=top><td align=center></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>New Jersey&#151;1.3%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2">AAA</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">$ 4,935</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Newark Hsg. Auth., Port Auth. Port
Newark Marine Term. Rental Backed, <br>
&nbsp; &nbsp; &nbsp; Redev. Projs.,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.00%, 1/01/37, MBIA</font></td>
<td align=center><font size="2">01/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">$ 5,180,467</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>New York&#151;9.1%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">New York City Mun. Wtr. Fin. Auth.,
Wtr. &amp; Swr. Sys. Rev.,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">12,650</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. B, 5.00%, 6/15/36, FSA</font></td>
<td align=center><font size="2">12/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">13,397,362</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">7,305</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. C, 5.00%, 6/15/35, AMBAC</font></td>
<td align=center><font size="2">06/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">7,729,201</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">New York City Trust Cultural Resources,
American Museum of Natural History,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 7/01/44, MBIA</font></td>
<td align=center><font size="2">07/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,528,900</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,660</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Sales Tax Asset Receivable Corp.,
Ser. A, 5.00%, 10/15/29, AMBAC</font></td>
<td align=center><font size="2">10/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,998,270</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">36,653,733</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Pennsylvania&#151;5.3%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">AAA</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,420</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Iroquois Sch. Dist., 5.00%, 2/01/45,
FSA</font></td>
<td align=center><font size="2">08/15 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,670,241</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">BBB+</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Lebanon Cnty. Hlth. Facs. Auth.,
Good Samaritan Hosp. Proj., 6.00%, 11/15/35</font></td>
<td align=center><font size="2">11/12 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,323,300</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,200</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Philadelphia Gas Wks., Ser. 3, 5.125%,
8/01/31, FSA</font></td>
<td align=center><font size="2">08/11 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,449,808</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,560</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Tpke. Comm., 5.00%, 7/15/41, AMBAC</font></td>
<td align=center><font size="2">07/11 @ 101</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,762,510</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">21,205,859</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1><tr valign=top><td align=center></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>South Carolina&#151;9.4%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2">AAA</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">So. Carolina Pub. Svc. Auth., Ser.
B, 5.50%, 1/01/36, FSA</font></td>
<td align=center><font size="2">01/12 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,450,950</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">So. Carolina Transp. Infrastructure
Bank, AMBAC,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">12,750</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 10/01/33</font></td>
<td align=center><font size="2">10/12 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">13,403,310</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.00%, 10/01/33</font></td>
<td align=center><font size="2">10/13 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,285,550</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">12,660</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. B, 5.125%, 10/01/26</font></td>
<td align=center><font size="2">10/11 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">13,470,367</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">37,610,177</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Tennessee&#151;3.9%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Knox Cnty. Hlth. Edl. &amp; Hsg.
Facs. Brd., Hosp. Facs. Rev., Ser. A, FSA,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">11,705</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Zero Coupon, 1/01/22</font></td>
<td align=center><font size="2">01/13 @ 59.566</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,834,867</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,260</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Zero Coupon, 1/01/23</font></td>
<td align=center><font size="2">01/13 @ 56.016</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,594,362</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">8,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Zero Coupon, 1/01/24</font></td>
<td align=center><font size="2">01/13 @ 52.749</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,097,740</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,850</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Zero Coupon, 1/01/25</font></td>
<td align=center><font size="2">01/13 @ 49.712</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,350,851</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Zero Coupon, 1/01/26</font></td>
<td align=center><font size="2">01/13 @ 46.781</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">1,608,850</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">15,486,670</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Texas&#151;23.0%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">BBB</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,700</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Comal Cnty. Hlth. Facs., Hlth. Care
Sys., McKenna Mem. Proj., Ser. A, <br>
&nbsp; &nbsp; &nbsp; 6.25%, 2/01/32</font></td>
<td align=center valign="bottom"><font size="2">02/13 @ 100</font></td>
<td valign="bottom">&nbsp;</td>
<td align=right valign="bottom"><font size="2">3,991,079</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,030</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Coppell Indpt. Sch. Dist., Zero Coupon,
8/15/30</font></td>
<td align=center><font size="2">No Opt. Call</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,910,907</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,350</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Dallas Area Rapid Trans., 5.00%,
12/01/31, AMBAC</font></td>
<td align=center><font size="2">12/11 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,443,695</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Harris Cnty.,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">7,485</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; GO, Zero Coupon, 8/15/25, MBIA</font></td>
<td align=center><font size="2">No Opt. Call</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,905,452</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,915</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; GO, Zero Coupon, 8/15/28, MBIA</font></td>
<td align=center><font size="2">No Opt. Call</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,582,631</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,510</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Toll Road Rev., 5.00%, 8/15/30,
FSA</font></td>
<td align=center><font size="2">08/12 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,749,795</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Harris Cnty. Sports Auth., MBIA,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">26,890</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A-3, Zero Coupon, 11/15/38</font></td>
<td align=center><font size="2">11/24 @ 43.826</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,425,287</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">27,675</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A-3, Zero Coupon, 11/15/39</font></td>
<td align=center><font size="2">11/24 @ 41.258</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,287,411</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">5,785</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. H, Zero Coupon, 11/15/38</font></td>
<td align=center><font size="2">11/31 @ 64.91</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">991,144</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,160</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. H, Zero Coupon, 11/15/39</font></td>
<td align=center><font size="2">11/31 @ 60.976</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">991,391</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Northside Indpt. Sch. Dist., Sch.
Bldg. Rmkt, 5.125%, 6/15/29</font></td>
<td align=center><font size="2">06/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,118,070</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">San Antonio Wtr., FGIC,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,350</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.125%, 5/15/29</font></td>
<td align=center><font size="2">05/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,989,446</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; 5.125%, 5/15/34</font></td>
<td align=center><font size="2">05/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">10,645,500</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">25,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Texas Tpke. Auth., Central Sys. Rev.,
Ser. A, 5.00%, 8/15/42, AMBAC</font></td>
<td align=center><font size="2">08/12 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">25,884,250</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">BBB+</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Tyler Cnty. Hlth. Facs. Dev., Mother
Frances Hosp., 6.00%, 7/01/31</font></td>
<td align=center><font size="2">07/12 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,175,020</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">92,091,078</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Virginia&#151;1.9%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Chesterfield Cnty. Indl. Dev. Auth.,
PCR, Elec. &amp; Pwr. Co.,</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">A3</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. A, 5.875%, 6/01/17</font></td>
<td align=center><font size="2">11/10 @ 102</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,348,540</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">A3</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,000</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp; &nbsp; &nbsp; Ser. B, 5.875%, 6/01/17</font></td>
<td align=center><font size="2">11/10 @ 102</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,464,720</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">7,813,260</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
</table>
<p align='center'>2<HR noshade size=4><PAGE><p>
<table width="100%"  border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><hr noshade size=1></td>
  </tr>
  <tr>
    <td><font size="3"><b>BlackRock Insured Municipal Income Trust (BYM) (continued)</b></font></td>
  </tr>
  <tr>
    <td><hr noshade size=1></td>
  </tr>
</table>
<p><table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr valign=top>
    <td width="8%" align=center></td>
    <td width="1%">&nbsp;</td>
    <td width="10%" align=center><font size="2"><b>Principal</b></font></td>
    <td width="3%">&nbsp;</td>
    <td width="58%" align=center><font size="2"><b>&nbsp;</b></font></td>
    <td width="9%" align=center></td>
    <td width="0%">&nbsp;</td>
    <td width="11%">&nbsp;</td>
    <td width="0%">&nbsp;</td>
  </tr>
  <tr valign=top bgcolor='#DDDDDD'>
    <td align=center><font size="2"><b>&nbsp;</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Amount</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>&nbsp;</b></font></td>
    <td align=center><font size="2"><b>Option Call</b></font></td>
    <td>&nbsp;</td>
    <td align=center></td>
    <td>&nbsp;</td>
  </tr>
  <tr valign=top>
    <td align=center><font size="2"><b>Rating</b><sup><b>1</b></sup></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>(000)</b></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Description</b></font></td>
    <td align=center><font size="2"><b>Provisions</b><sup><b>2</b></sup></font></td>
    <td>&nbsp;</td>
    <td align=center><font size="2"><b>Value</b></font></td>
    <td>&nbsp;</td>
  </tr>
  <tr valign=top>
    <td COLSPAN='9' ><HR noshade size=2>
  <tr valign=top><td align=center><font size="2"><font size="2"></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Washington&#151;8.8%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2"></font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2">AAA</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">$ 9,610</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Central Washington Univ. Sys. Rev.,
5.00%, 5/01/34, FGIC</font></td>
<td align=center><font size="2">05/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">$&nbsp;  10,110,489</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">3,655</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Chelan Cnty. Pub. Util. Dist. 1,
Chelan Hydro Sys., Ser. C, <br>
&nbsp; &nbsp; &nbsp; 5.125%, 7/01/33, AMBAC</font></td>
<td align=center valign="bottom"><font size="2">07/12 @ 100</font></td>
<td valign="bottom">&nbsp;</td>
<td align=right valign="bottom"><font size="2">3,848,605</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Port of Seattle, Ser. A, 5.00%, 4/01/31,
FGIC</font></td>
<td align=center><font size="2">10/11 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,652,460</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,500</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Seattle, GO, Ser. F, 5.125%, 12/15/28,
MBIA</font></td>
<td align=center><font size="2">12/08 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">9,957,235</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">AAA</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,380</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Washington, GO, Ser. A, 5.00%, 7/01/25,
FSA</font></td>
<td align=center><font size="2">07/11 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,710,484</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">35,279,273</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>West Virginia&#151;0.3%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">AAA</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">1,295</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Econ. Dev. Auth., Correctional Juvenile
Safety, Ser. A, 5.00%, 6/01/29, MBIA</font></td>
<td align=center><font size="2">06/14 @ 100</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">1,371,936</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Total Long-Term Investments (cost
$563,084,217)</b></font></td>
<td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">599,329,810</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><font size="2"><b>SHORT-TERM INVESTMENTS&#151;6.1%</b></font></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Alaska&#151;1.80%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">A1+</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">7,300</font></td>
<td><font size="2"><sup> 5</sup></font></td>
<td align=left><font size="2">Valdez Alaska Marine Term., Refdg.
Exxon Pipeline Co. Proj., Ser. A, <br>
&nbsp; &nbsp; &nbsp; 2.87%, 6/01/05, FRDD</font></td>
<td align=center valign="bottom"><font size="2">N/A</font></td>
<td valign="bottom">&nbsp;</td>
<td align=right valign="bottom"><font size="2">7,300,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Maryland&#151;1.5%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">A1+</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,045<sup> </sup></font></td>
<td><font size="2"><sup> 5</sup></font></td>
<td align=left><font size="2">Hlth. &amp; Higher Edl. Facs. Auth.,
Pooled Ln. Prog. Proj., Ser. D, 2.95%, 6/02/05, FRWD</font></td>
<td align=center><font size="2">N/A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,045,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Ohio&#151;0.3%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">VMIG1</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">1,000<sup> </sup></font></td>
<td><font size="2"><sup> 5</sup></font></td>
<td align=left><font size="2">Hamilton Cnty. Hosp. Facs., 3.01%,
6/02/05, FRWD</font></td>
<td align=center><font size="2">N/A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">1,000,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Pennsylvania&#151;0.2%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">VMIG1</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">700<sup> </sup></font></td>
<td><font size="2"><sup> 5</sup></font></td>
<td align=left><font size="2">Higher Ed. Facs. Auth., St. Sys.
Higher Ed., Ser. A, 2.93%, 6/02/05, MBIA, FRWD</font></td>
<td align=center><font size="2">N/A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">700,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Wyoming&#151;1.2%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">A1+</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,850<sup> </sup></font></td>
<td><font size="2"><sup> 5</sup></font></td>
<td align=left><font size="2">Lincoln Cnty. PCR, Exxon Proj., Ser.
D, 2.81%, 6/01/05, FRDD</font></td>
<td align=center><font size="2">N/A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,850,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2"><b>&nbsp;</b></font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Puerto Rico&#151;1.1%</b></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">A-1</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">1,800</font></td>
<td><font size="2"><sup> 5</sup></font></td>
<td align=left><font size="2">Gov&#146;t. Dev. Bank, 2.85%, 6/01/05,
MBIA, FRWD</font></td>
<td align=center><font size="2">N/A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">1,800,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">A-1+</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,500</font></td>
<td><font size="2"><sup> 5</sup></font></td>
<td align=left><font size="2">Hwy. &amp; Transp. Auth., Transp.
Rev., Ser. A, 2.90%, 6/01/05, AMBAC, FRWD</font></td>
<td align=center><font size="2">N/A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">2,500,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">&nbsp;</font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">4,300,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td >&nbsp;</td>
  <td >&nbsp;</td>
  <td ><HR noshade size=2></td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><b>&nbsp;</b></font></td>
<td>&nbsp;</td>
<td align=center><font size="2"><b>Shares</b></font></td>
<td>&nbsp;</td>
<td align=center><font size="2"><b>&nbsp;</b></font></td>
<td align=center><font size="2"><b>&nbsp;</b></font></td>
<td>&nbsp;</td>
<td align=center></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><b>&nbsp;</b></font></td>
<td>&nbsp;</td>
<td align=center><font size="2"><b>(000)</b></font></td>
<td>&nbsp;</td>
<td align=center><font size="2"><b>&nbsp;</b></font></td>
<td align=center><font size="2"><b>&nbsp;</b></font></td>
<td>&nbsp;</td>
<td align=center></td>

<td>&nbsp;</td></tr>
<tr valign=top><td >&nbsp;</td>
  <td >&nbsp;</td>
  <td ><HR noshade size=2></td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
  <td >&nbsp;</td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><font size="2"><b>Money Market Fund&#151;0.0%</b></font></font></td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2"><font size="2">&nbsp;</font></font></td>
<td>&nbsp;</td>
<td align=right><font size="2">50</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">AIM Tax Free Investment Co. Cash
Reserve Portfolio</font></td>
<td align=center><font size="2">N/A</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">50,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Total Short-Term Investments (cost
$24,245,000)</b></font></td>
<td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">24,245,000</font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Total Investments&#151;155.6%
(cost $587,329,617</b><sup><b>6</b></sup>)</font></td>
<td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">$ 623,574,810 </font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Other assets in excess of liabilities&#151;1.5%</font></td>
<td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">6,211,048</font></td>

<td>&nbsp;</td></tr>
<tr valign=top><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2">Preferred shares at redemption value,
including dividends payable&#151;(57.1)%</font></td>
<td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">(229,007,359</font></td>

<td><font size="2">)</font></td></tr>
<tr valign=top><td COLSPAN='9' ><HR noshade size=1></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=left><font size="2"><b>Net Assets Applicable to Common
Shareholders&#151;100%</b></font></td>
<td align=center><font size="2">&nbsp;</font></td>
<td>&nbsp;</td>
<td align=right><font size="2">$ 400,778,499 </font></td>

<td>&nbsp;</td></tr>
<tr valign=top bgcolor='#DDDDDD'><td COLSPAN='9' ><HR noshade size=3></td>
</tr>
</table>

<p><p><table border="0" cellspacing="0" cellpadding="2"><tr valign=top><td COLSPAN='2' ><HR align="left" width="10%" size=1 noshade></td></tr>
<tr valign=top><td width="24" align=left><font size="2"><font size="2"><sup></sup></font><sup><font size="2">1</font></sup></font></td>
<td width="1054" align=left><font size="2">Using the higher of S&amp;P&#146;s,
Moody&#146;s or Fitch&#146;s rating.</font></td>
</tr>
<tr valign=top><td align=left><font size="2"><sup>2</sup></font></td>
<td align=left><font size="2">Date (month/year) and price of the
earliest optional call or redemption. There may be other call provisions at varying
prices at later dates.</font></td>
</tr>
<tr valign=top><td align=left><font size="2"><sup>3</sup></font></td>
<td align=left><font size="2">This bond is prefunded. U.S. government
securities, held in escrow, are used to pay interest on this security, as well as
retire the bond in full at the date indicated, typically at a premium to par.</font></td>
</tr>
<tr valign=top><td align=left><font size="2"><sup>4</sup></font></td>
<td align=left><font size="2">Securities, or a portion thereof,
pledged as collateral with a value of $2,515,296 on 1,683 short U.S. Treasury Note
futures contracts expiring Sept. 2005. The value of such contracts on May 31, 2005
was $190,626,047, with an unrealized loss of $2,736,310.</font></td>
</tr>
<tr valign=top><td align=left><font size="2"><sup>5</sup></font></td>
<td align=left><font size="2">For purposes of amortized cost valuation,
the maturity date of this instrument is considered to be the earlier of the next
date on which the security can be redeemed at par, or the next date on which the
rate of interest is adjusted.</font></td>
</tr>
<tr valign=top><td align=left><font size="2"><sup>6</sup></font></td>
<td align=left><font size="2">Cost for Federal income purposes
is $587,441,737. The net unrealized appreciation on a tax basis is $36,133,073 consisting
of $36,470,273 gross unrealized appreciation and $337,200 gross unrealized depreciation.</font></td></tr></table>

<p>
<table border="0" cellspacing="0" cellpadding="0"><tr valign=top><td align=left><font size="2"><font size="2">The
value (market value plus accrued interest) of securities that are covered by insurance,
which ensures the payment of principal and interest, represent approximately 81.3%
of the Trust&#146;s managed assets.</font></font></td><td>&nbsp;</td></tr></table>
<p><p><table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr align="center" valign=top>
    <td colspan="4"><p><font size="2"><b>KEY TO ABBREVIATIONS</b></font></td>
  </tr>
  <tr valign=top>
    <td colspan="4" align=left>&nbsp;</td>
  </tr>
  <tr valign=top><td width="7%" align=left><font size="2"><font size="2">AMBAC</font></font></td>
<td width="43%" align=left><font size="2">&#151; American Municipal Bond Assurance
Corporation</font></td>
<td width="6%" align=left><font size="2">FSA</font></td>
<td width="44%" align=left><font size="2">&#151; Financial Security Assurance</font></td>

</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=left><font size="2">FGIC</font></td>
<td align=left><font size="2">&#151; Financial Guaranty Insurance
Company</font></td>
<td align=left><font size="2">GO</font></td>
<td align=left><font size="2">&#151; General Obligation</font></td>
</tr>
<tr valign=top><td align=left><font size="2">FRDD</font></td>
<td align=left><font size="2">&#151; Floating Rate Daily Demand</font></td>
<td align=left><font size="2">MBIA</font></td>
<td align=left><font size="2">&#151; Municipal Bond Insurance Association</font></td>
</tr>
<tr valign=top bgcolor='#DDDDDD'><td align=left><font size="2">FRWD</font></td>
<td align=left><font size="2">&#151; Floating Rate Weekly Demand</font></td>
<td align=left><font size="2">PCR</font></td>
<td align=left><font size="2">&#151; Pollution Control Revenue</font></td>
</tr>
</table>
<p><p align='center'>3
<HR noshade size=4><PAGE>

<P><B><FONT face="serif">Item 2. Controls and Procedures.</FONT></B><FONT face="serif"> </FONT></P>
<P> <FONT face="serif">(a) The registrant's principal executive officer and principal
    financial officer have evaluated the registrant's disclosure controls and
    procedures within 90 days of this filing and have concluded that the registrant&#146;s
    disclosure controls and procedures are effective, as of that date, in ensuring
    that information required to be disclosed by the registrant in this Form
    N-Q was recorded, processed, summarized, and reported timely. </FONT></P>
<P> <FONT face="serif">(b) The registrant's principal executive officer and principal
    financial officer are aware of no changes in the registrant's internal control
    over financial reporting that occurred during the registrant's most recent
    fiscal quarter that has materially affected, or is reasonably likely to materially
    affect, the registrant's internal control over financial reporting. </FONT></P>
<TABLE>
  <TR>
    <TD nowrap><B><FONT face="serif">Item 3. Exhibits.</FONT></B><BR>
    </TD>
  </TR>
</TABLE>
<P> <FONT face="serif">Separate certifications of the registrant&#146;s principal
    executive and financial officers pursuant to Section 302 of the Sarbanes-Oxley
    Act of 2002 are attached as EX-99.CERT.</FONT></P>
<HR noshade  width="100%" size=4>
<P align="left" style="page-break-before:always"></P>
<PAGE> <A name="page_3"></A>

<p align="center"><B><FONT face="serif">SIGNATURES</FONT></B><BR>


<P> <FONT face="serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Exchange
    Act of 1934 and the Investment Company Act of 1940, the registrant has duly
    caused this report to be signed on its behalf by the undersigned, thereunto
    duly authorized. </FONT></P>
<P> <FONT face="serif">(Registrant)___</FONT><U><FONT face="serif">BlackRock
      Insured Municipal Income Trust</FONT></U><FONT face="serif">___ </FONT></P>
<P> <FONT face="serif">By: __<U>/s/ Henry Gabbay</U>_____________________________________________<BR>
Name: Henry Gabbay <br>
Title: Treasurer <br>
Date: July 22, 2005 </FONT></P>
<P> <FONT face="serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Exchange
    Act of 1934 and the Investment Company Act of 1940, this report has been
    signed below by the following persons on behalf of the registrant and in
    the capacities and on the dates indicated. </FONT></P>
<P> <FONT face="serif">By: __<U>/s/ Robert S. Kapito</U>_____________________________________________<BR>
  Name: Robert S. Kapito <br>
Title: Principal Executive Officer <br>
Date: July 22, 2005 </FONT></P>
<P> <FONT face="serif">By: __<U>/s/ Henry Gabbay</U>_____________________________________________<BR>
  Name: Henry Gabbay <br>
Title: Principal Financial Officer <br>
Date: July 22, 2005 </FONT></P>
<HR noshade  width="100%" size=4>





</font></font></BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>c38260_ex99cert.htm
<TEXT>

<HTML>
<HEAD>
   <TITLE></TITLE>
</HEAD>

<BODY bgcolor="#ffffff">
<A name="page_4"></A>

<p align="right"><B><FONT face="serif">EX-99.CERT</FONT></B><BR></p>
<P align="center">
<B><FONT face="serif">CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER</FONT></B></P>

<center>
  <p><B><U><FONT face="serif">CERTIFICATIONS</FONT></U></B></p>
  <p align="left">

<p align="left"><FONT face="serif">I, Robert S. Kapito, certify that:</FONT></p>
</center>
<P>
<FONT face="serif">1. I have reviewed this report on Form N-Q of BlackRock Insured Municipal Income Trust; </FONT></P>
<P>
<FONT face="serif">2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were
made, not misleading with respect to the period covered by this report; </FONT></P>
<P>
<FONT face="serif">3. Based on my knowledge, the schedules of investments included in this report fairly present in all material respects the investments of the registrant as of the end of the fiscal quarter for which the report is filed; </FONT></P>
<P>
<FONT face="serif">4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control
over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have: </FONT></P>
<P>
<FONT face="serif">(a)</FONT><FONT size=2 face="sans-serif"></FONT><FONT face="serif">Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material
information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; </FONT></P>
<P>
<FONT face="serif">(b) Not applicable prior to the first report on Form N-Q following the first annual report on Form N-CSR for a fiscal year ending on or after November 15, 2004; </FONT></P>
<P>
<FONT face="serif">(c)</FONT><FONT size=2 face="sans-serif"></FONT><FONT face="serif">Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the
disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report, based on such evaluation; and</FONT><FONT size=2 face="sans-serif"> </FONT></P>
<P>
<FONT face="serif">(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter that has materially affected, or is reasonably likely to
materially affect, the registrant's internal control over financial reporting; and </FONT></P>

<HR noshade  width="100%" size=4>

<P align="left" style="page-break-before:always"></P><PAGE>
<A name="page_5"></A>

<P>
<FONT face="serif">5. The registrant's other certifying officer(s) and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions): </FONT></P>
<P>
<FONT face="serif">(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process,
summarize, and report financial information; and </FONT></P>
<P>
<FONT face="serif">(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting. </FONT></P>
<TABLE><TR><TD nowrap>
<FONT face="serif">Date: July 22, 2005</FONT><BR>
</TD></TR></TABLE>
<TABLE align="right">
  <TR><TD nowrap>
    <center>
      <FONT face="serif">_______<U>/s/ Robert S. Kapito</U>_______</FONT><BR>
      <FONT face="serif">Robert S. Kapito </FONT><BR>
      <FONT face="serif">Principal Executive Officer </FONT><BR>
    </center></TD></TR></TABLE>



<p>&nbsp;</p>
<p>&nbsp;</p>
<HR noshade  width="100%" size=4>

<P align="left" style="page-break-before:always"></P><PAGE>
<A name="page_6"></A>

<TABLE align="right">
  <TR><TD nowrap>
<B><FONT face="serif">EX-99.CERT</FONT></B><BR>
</TD></TR></TABLE>
<P align="center">&nbsp;</P>
<P align="center"><B><FONT face="serif">CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER</FONT></B></P>
<TABLE align="center">
  <TR><TD nowrap>
<B><U><FONT face="serif">CERTIFICATIONS</FONT></U></B><BR>
</TD></TR></TABLE>

<p></p><FONT face="serif">I, Henry Gabbay, certify that:</FONT><BR>

<P>
<FONT face="serif">1. I have reviewed this report on Form N-Q of BlackRock Insured Municipal Income Trust; </FONT></P>
<P>
<FONT face="serif">2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were
made, not misleading with respect to the period covered by this report; </FONT></P>
<P>
<FONT face="serif">3. Based on my knowledge, the schedules of investments included in this report fairly present in all material respects the investments of the registrant as of the end of the fiscal quarter for which the report is filed; </FONT></P>
<P>
<FONT face="serif">4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control
over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have: </FONT></P>
<P>
<FONT face="serif">(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its
consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; </FONT></P>
<P>
<FONT face="serif">(b) Not applicable prior to the first report on Form N-Q following the first annual report on Form N-CSR for a fiscal year ending on or after November 15, 2004; </FONT></P>
<P>
<FONT face="serif">(c)</FONT><FONT size=2 face="sans-serif"></FONT><FONT face="serif">Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the
disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report, based on such evaluation; and</FONT><FONT size=2 face="sans-serif"> </FONT></P>
<P>
<FONT face="serif">(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter that has materially affected, or is reasonably likely to
materially affect, the registrant's internal control over financial reporting; and </FONT></P>

<HR noshade  width="100%" size=4>

<P align="left" style="page-break-before:always"></P><PAGE>
<A name="page_7"></A>

<P>
<FONT face="serif">5. The registrant's other certifying officer(s) and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions): </FONT></P>
<P>
<FONT face="serif">(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process,
summarize, and report financial information; and </FONT></P>
<P>
<FONT face="serif">(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting. </FONT></P>
<TABLE><TR><TD nowrap>
<FONT face="serif">Date: July 22, 2005</FONT><BR>
</TD></TR></TABLE>
<TABLE align="right">
  <TR><TD nowrap>
    <center>
      <FONT face="serif">______<U>/s/ Henry Gabbay</U>______</FONT><BR>
      <FONT face="serif">Henry Gabbay </FONT><BR>
      <FONT face="serif">Principal Financial Officer </FONT><BR>
    </center></TD></TR></TABLE>

<p>&nbsp;</p>
<p>&nbsp;</p>
<HR noshade  width="100%" size=4>

</BODY>

</HTML>

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
