UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY
   
Investment Company Act file number:      
     811-07090
 
 
BlackRock California Insured Municipal 2008 Term Trust, Inc.

(Exact name of registrant as specified in charter)
   
100 Bellevue Parkway, Wilmington, DE 
19809 


(Address of principal executive offices) 
(Zip code) 

Robert S. Kapito, President
BlackRock California Insured Municipal 2008 Term Trust, Inc.
40 East 52nd Street, New York, NY 10022
(Name and address of agent for service)
     
Registrant's telephone number, including area code:        888-825-2257
   
Date of fiscal year end:         December 31, 2005 
 
Date of reporting period:      September 30, 2005
 


Item 1. Schedule of Investments.

The Registrant’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:

PORTFOLIO OF INVESTMENTS (unaudited)
SEPTEMBER 30, 2005

BlackRock California Insured Municipal 2008 Term Trust (BFC)

      Principal                
        Amount           Option Call    
    Rating1   (000)   Description       Provisions2   Value  

          LONG-TERM INVESTMENTS—153.5%            
            California—141.3%            
    AAA   $2,635   Alameda Cnty., COP, Ser. A, 3.80%, 12/01/08, MBIA       No Opt. Call   $ 2,705,144  
    AAA   1,060   Anaheim Union High Sch. Dist., GO, Ser. A, 3.50%, 8/01/08, FSA       No Opt. Call   1,076,801  
    AAA   1,250   Anaheim Union High Sch. Dist., GO, Ser. A, 4.00%, 8/01/09, FSA       No Opt. Call   1,293,413  
    AAA   1,000   Burbank Elec. Rev., 3.50%, 6/01/09, MBIA       No Opt. Call   1,016,120  
            California, GO,            
    AAA   2,000       5.00%, 6/01/09, MBIA       No Opt. Call   2,131,720  
    AAA   3,000       5.50%, 4/01/09, MBIA       No Opt. Call   3,238,410  
    AAA   3,000       5.50%, 2/01/10, MBIA       No Opt. Call   3,278,850  
    AAA   2,000       6.25%, 9/01/08, FGIC       No Opt. Call   2,178,920  
    AAA   15,000       6.30%, 9/01/08, MBIA       No Opt. Call   16,362,600  
    AAA   2,600   Castaic Lake Wtr. Agcy., COP, Wtr. Sys. Impvt.Proj., Ser. A, 7.25%, 8/01/10, MBIA       No Opt. Call   3,063,112  
    AAA   1,135   Chaffey Cmnty. Coll. Dist., GO, Ser. A, 3.75%, 7/01/09, FSA       No Opt. Call   1,163,647  
            Chula Vista, COP, Police Fac. Proj.,            
    AAA   1,000       4.00%, 8/01/08, MBIA       No Opt. Call   1,029,300  
    AAA   1,000       4.00%, 8/01/09, MBIA       No Opt. Call   1,034,730  
    AAA   5,500 3      Clovis Unified Sch. Dist., Ser. B, Zero Coupon, 8/01/08, FGIC       ETM   5,035,635  
            Dept. of Wtr. Res. Pwr. Sply. Rev., Ser. A,            
    AAA   10,000       3.125%, 5/01/08, FSA       No Opt. Call   10,028,100  
    AAA   10,000       3.375%, 5/01/09, MBIA       No Opt. Call   10,082,000  
    AAA   1,000   Dept. of Wtr. Res. Wtr. Rev., Central Valley Proj., Ser. Z, 4.00%, 12/01/09, FGIC       No Opt. Call   1,036,390  
    AAA   1,855   El Paso De Robles, GO, Ser. A, Zero Coupon, 8/01/09, FGIC       No Opt. Call   1,636,240  
    AAA   4,025   Elsinore Valley Mun. Wtr. Dist., COP, Ser. A, 6.00%, 7/01/09, FGIC       No Opt. Call   4,429,392  
    AAA   1,055   Glendale Unified Sch. Dist., Ser. D, 3.50%, 9/01/09, MBIA       No Opt. Call   1,073,114  
    AAA   2,000   Hlth. Facs. Fin. Auth. Sutter Hlth. Care Sys. Proj., 5.70%, 8/15/09, MBIA       08/06 @ 102   2,085,520  
            Long Beach Bd. of Fin. Auth. Tax Alloc. Rev., Redev. Projs.,            
    AAA   1,245       3.50%, 8/01/08, AMBAC       No Opt. Call   1,261,347  
    AAA   1,120       3.75%, 8/01/09, AMBAC       No Opt. Call   1,144,797  
    AAA   13,110   Los Angeles, GO, Ser. A, 3.50%, 9/01/09, MBIA       No Opt. Call   13,335,099  
            Los Angeles Cnty., Asset Leasing Corp. Rev.,            
    AAA   2,910       3.80%, 12/01/07, AMBAC       No Opt. Call   3,092,137  
    AAA   8,090       3.85%, 12/01/08, AMBAC       No Opt. Call   8,825,381  
    AAA   8,600       4.05%, 12/01/09, AMBAC       No Opt. Call   9,578,078  
    AAA   4,405   Los Angeles Cnty. Met. Trans. Auth. Rev., Spl. Benefit Assmt. Dist A1, 3.75%,            
                9/01/08, AMBAC       No Opt. Call   4,507,284  
    AAA   9,835   Los Angeles Cnty. Sanitation Dists. Fin. Auth. Rev., Ser. A, 4.00%, 10/01/09, FSA       No Opt. Call   10,190,830  
    AAA   6,000   Los Angeles Dept. of Arpts. Arpt. Rev., LA Intl. Arpt. Proj., Ser. B, 5.00%,            
                5/15/09, MBIA       No Opt. Call   6,390,660  
    AAA   3,860   Los Angeles Sanitation Equip., Ser. A, 3.625%, 2/01/09, FSA       No Opt. Call   3,931,950  
            Los Angeles Unified Sch. Dist.,            
    AAA   2,660       Ser. B, 3.00%, 10/01/08, FSA       No Opt. Call   2,663,006  
    AAA   7,500       Ser. F, 3.00%, 7/01/09, FSA       No Opt. Call   7,491,900  
    AAA   1,000   Mount Diablo Unified Sch. Dist., GO, 3.50%, 8/01/08, FSA       No Opt. Call   1,015,850  
    AAA   1,000   Orange Cnty. Local Trans. Auth. Sales Tax Rev., 6.00%, 2/15/09, MBIA       No Opt. Call   1,092,510  
    AAA   2,495   Pasadena Unified Sch. Dist., Ser. C, 3.50%, 11/01/08, FSA       No Opt. Call   2,534,995  
    AAA   2,100   Pub. Wks. Brd. Energy Efficiency Proj., Ser. A, 5.625%, 10/01/08, AMBAC       10/05 @ 102   2,149,518  
    AAA   3,345   Sacramento City Fin. Auth., City Hall & Redev. Projs., Ser. A, 3.50%, 12/01/08, FSA       No Opt. Call   3,396,914  
    AAA   1,000   Sacramento City Unified Sch. Dist., 3.50%, 7/01/09, FGIC       No Opt. Call   1,016,460  
            Sacramento Mun. Util. Dist. Elec. Rev., Ser. C,            
    AAA   825 3     5.75%, 11/15/07, MBIA       ETM   828,036  
    AAA   3,750 3     5.75%, 11/15/08, FGIC       ETM   3,763,800  
    AAA   3,950 3     5.75%, 11/15/09, MBIA       ETM   3,964,536  
    AAA   5,000 3 San Bernardino Cnty. Trans. Auth., Sales Tax Rev., 6.00%, 3/01/10, FGIC       ETM   5,375,150  
            San Diego Cnty. Regl. Trans. Comm. Sales Tax Rev., Ser. A,            
    AAA   7,830 3     6.00%, 4/01/08, MBIA       ETM   8,247,339  
    AAA   2,500 3     6.00%, 4/01/08, FGIC       ETM   2,633,250  
            San Diego Cnty., COP,            
    AAA   2,360       5.00%, 2/01/09, AMBAC       No Opt. Call   2,501,954  
    AAA   11,000       5.625%, 9/01/12, AMBAC       No Opt. Call   12,436,930  
    AAA   12,725   San Diego Pub. Facs. Fin. Auth. Wtr. Rev., 3.00%, 8/01/09, MBIA       No Opt. Call   12,711,003

1


BlackRock California Insured Municipal 2008 Term Trust (BFC) (continued)

      Principal                
        Amount           Option Call    
    Rating1   (000)   Description       Provisions2   Value  

          California—(continued)            
    AAA   $ 1,250   San Francisco City & Cnty., GO, 4.00%, 6/15/09, FSA       No Opt. Call   $ 1,294,250  
    AAA   1,000 3      San Jose Redev. Agcy., 4.00%, 8/01/09, MBIA       ETM   1,034,000  
    AAA   1,000   San Mateo Cnty. Cmnty. Coll. Dist., GO, Ser. A, 3.30%, 9/01/08, FGIC       No Opt. Call   1,010,770  
            Santa Ana Unified Sch. Dist., GO, Ser. B,            
    AAA   1,000       Zero Coupon, 8/01/08, FGIC       No Opt. Call   915,320  
    AAA   2,000       Zero Coupon, 8/01/09, FGIC       No Opt. Call   1,764,140  
    AAA   4,030   Santa Barbara Cnty. Local Transp. Auth. Sales Tax Rev., 3.00%, 3/15/09, FSA       No Opt. Call   4,026,010  
    AAA   4,620   Santa Clara Valley Wtr. Dist., COP, 4.00%, 2/01/09, FGIC       No Opt. Call   4,760,448  
    AAA   2,470   Santa Clara, COP, Ser. B, 3.50%, 2/01/09, AMBAC       No Opt. Call   2,506,358  
    AAA   4,665   So. Coast Air Qual. Mgmt. Dist. Bldg. Corp., 4.00%, 8/01/09, AMBAC       No Opt. Call   4,827,016  
    AAA   2,500   Univ. of California, Ser. A, 5.00%, 5/15/09, AMBAC       No Opt. Call   2,667,175  
    AAA   2,000 4 Univ. of California, Ser. F, 5.00%, 9/01/06, FGIC       N/A   2,059,620  

                        237,924,979  

            Puerto Rico—12.2%            
            Elec. Pwr. Auth.,            
    AAA   5,280       Ser. DD, 5.00%, 7/01/09, FSA       07/08 @ 101.5   5,602,555  
    AAA   7,000       Ser. DD, 5.00%, 7/01/10, FSA       07/08 @ 101.5   7,433,300  
    AAA   3,000       Ser. KK, 4.50%, 7/01/09, XLCA       No Opt. Call   3,138,420  
    AAA   4,000   Mun. Fin. Agcy., Ser. A, 5.625%, 8/01/10, FSA       08/09 @ 101   4,374,040  

                        20,548,315  

            Total Long-Term Investments (cost $248,912,780)           258,473,294  

       
            SHORT-TERM INVESTMENTS—7.2%            
            California—6.3%            
    A-1+   5,000 5 Dept. of Wtr. Res. Pwr. Sply. Rev., Ser. B-2, 2.34%, 10/03/05, FRDD       N/A   5,000,000  
    A-1+   1,500 5 Orange Cnty. Sanitation Dist., COP, Ser. A, 2.77%, 10/03/05, FRDD       N/A   1,500,000  
    A-1+   4,100 5 Vacaville Multi-Fam. Mtg. Quail Run Proj., Ser. A, 2.72%, 10/05/05, FRWD       N/A   4,100,000  

                        10,600,000  

        Shares                
        (000)                

            Money Market Fund—0.9%            
        1,550   AIM Tax Free Investment Co. Cash Reserve Portfolio       N/A   1,550,000  

            Total Short-Term Investments (cost $12,150,000)           12,150,000  

            Total Investments—160.7% (cost $261,062,7806)           $ 270,623,294  
            Other assets in excess of liabilities—1.4%           2,394,695  
            Preferred shares at redemption value, including dividends payable—(62.1)%           (104,598,681)  

            Net Assets Applicable to Common Shareholders—100%           $ 168,419,308  


1   Using the higher of S&P’s, Moody’s or Fitch’s rating.  
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.  
3   Security is collateralized by U.S. Treasury obligations.  
4   This bond is prerefunded. 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.  
5   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. Rate shown is rate as of September 30, 2005.  
6   Cost for Federal tax purposes is $260,363,954. The net unrealized appreciation on a tax basis is $10,259,340, consisting of $10,567,533 gross unrealized appreciation and $308,193 unrealized depreciation.  
 
    The value (market value plus accrued interest) of securities that are covered by insurance, which ensures the payment of principal and interest, represent approximately 95.7% of the Trust’s managed assets. The Trust has the following insurance concentrations: 

AMBAC – 20.6%
FGIC – 13.9%
FSA – 25.0%
MBIA – 35.1%
XLCA – 1.1%


KEY TO ABBREVIATIONS
 
AMBAC     American Municipal Bond Assurance Corp.   FRWD     Floating Rate Weekly Demand  
COP     Certificate of Participation   FSA     Financial Security Assurance  
ETM     Escrowed to Maturity   GO     General Obligation  
FGIC     Financial Guaranty Insurance Co.   MBIA     Municipal Bond Insurance Assoc.  
FRDD     Floating Rate Daily Demand   XLCA     XL Capital Assurance  

2


Item 2. Controls and Procedures.

(a) The Registrant's principal executive and principal financial officers have evaluated the Registrant's disclosure controls and procedures within 90 days of this filing and have concluded, as of that date, that the Registrant’s disclosure controls and procedures were reasonably designed to ensure that information required to be disclosed by the Registrant in this Form N-Q was recorded, processed, summarized, and reported within the required time periods and that information to be disclosed by the Registrant in this Form N-Q was accumulated and communicated to the Registrant’s management , including it principle executive and principle financial officers, as appropriate to allow timely decisions regarding required disclosure.

(b) There were no changes in the Registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a -3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Registrant's internal control over financial reporting.

Item 3. Exhibits.

Separate certifications of the registrant’s principal executive and financial officers pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 are attached as EX-99.CERT.


SIGNATURES

     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.

(Registrant)     BlackRock California Insured Municipal 2008 Term Trust, Inc.     

By:      /s/ Henry Gabbay                                                                                                     
Name: Henry Gabbay
Title: Treasurer
Date: November 18, 2005

      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.

By:      /s/ Robert S. Kapito                                                                                                 
Name: Robert S. Kapito
Title: Principal Executive Officer
Date: November 18, 2005

By:      /s/ Henry Gabbay                                                                                                     

Name: Henry Gabbay
Title: Principal Financial Officer
Date: November 18, 2005