INSURED MUNICIPAL SECURITIES TRUST 33RD DISCOUNT SERIES, 497J, 1994-05-26

INSURED MUNICIPAL SECURITIES TRUST 33RD DISCOUNT SERIES
497J, 1994-05-26

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    BEAR, STEARNS & CO. INC. 
    250 Park Avenue 
    New York, New York 10167
    (212) 272-2000


                                   May 26, 1994


    VIA EDGAR

    Securities and Exchange Commission
    450 Fifth Street, N.W.
    Washington, D.C. 20549

                   Re:  Insured Municipal Securities Trust, 33rd Discount
                        Series
                        File No. 33-19414

    Gentlemen:

              As Sponsor of the above-referenced Trust, we are writing this
    letter to certify that: 

              (1) the form of Prospectus that would have been filed under Rule
    497(b) of the Securities Act of 1933, does not differ from that contained
    in the most recent Post-Effective Amendment to the Registration Statement
    on Form S-6 (the "Registration Statement"), and

              (2) the text of the most recent Registration Statement was filed
    electronically with the Securities and Exchange Commission on April 20,
    1994 and became effective April 29, 1994 pursuant to Rule 485(b).

                                  Insured Municipal Securities Trust, 33rd
                                  Discount Series


                                  BEAR, STEARNS & CO. INC.


                                  By:                         
                                       Peter J. DeMarco
                                       Authorized Signatory