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


                                 --------------


                                    FORM 8-K

                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


                        Date of Report: October 26, 2004
                       -----------------------------------
                        (Date of earliest event reported)


                       CITICORP MORTGAGE SECURITIES, INC.
                             (Packager and Servicer)
   (Issuer in Respect of the REMIC Pass-Through Certificates, Series 2004-8)
   --------------------------------------------------------------------------
               (Exact name of registrant as specified in charter)


   Delaware                 000-16107, 333-109722             13-3408717
 ----------------------------------------------------------------------------
  (State or other juris-       (Commission                 (I.R.S. Employer
 diction of organization)       File Nos.)                Identification No.)


   1000 Technology Drive, O'Fallon, Missouri                   63304
--------------------------------------------------          ----------
   (Address of principal executive offices)                 (Zip Code)


Registrant's Telephone Number, including area code: (636) 261-1313

--------------------------------------------------------------------------
(Former name, former address and former fiscal year, if changed since last
report.)


<PAGE>


Item 8.01.     Other Events.

                       CITICORP MORTGAGE SECURITIES, INC.
                 REMIC Pass-Through Certificates, Series 2004-8
                 -----------------------------------------------

     Attached as Exhibit I are the Computational Materials (as defined in the
no-action letter dated May 20, 1994 issued by the Securities and Exchange
Commission to Kidder, Peabody Acceptance Corporation I, Kidder, Peabody & Co.
Incorporated and Kidder Structured Asset Corporation) and/or Structural Term
Sheets (as defined in the no-action letter dated February 17, 1995 issued by the
Securities and Exchange Commission to the Public Securities Association)
prepared by Citigroup Global Markets Inc. that are required to be filed
pursuant to such letters.


                                        2

<PAGE>


                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                            CITICORP MORTGAGE SECURITIES, INC.
                                            (Registrant)

                                            By: /s/ Howard Darmstadter
                                               -------------------------
                                                    Howard Darmstadter
                                                    Assistant Secretary


Dated: October 26, 2004


                                       3


<PAGE>


                                  EXHIBIT INDEX

                                                                Paper (P) or
Exhibit No.                 Description                        Electronic (E)
-----------                 -----------                        --------------

     I             Computational Materials/Structural                 P
                   Term Sheets prepared Citigroup Global
                   Markets Inc.



                                       4
[{"type": "8-K", "sequence": "1", "filename": "compmats8k2004-8.txt", "description": "CMSI 2004-8 COMPUTATIONAL MATERIALS", "secsgml_size_bytes": 3720}]
{"company-data": {"conformed-name": "CITICORP MORTGAGE SECURITIES INC", "cik": "0000811785", "assigned-sic": "6189", "irs-number": "133408717", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-16107", "film-number": "041098499"}, "business-address": {"street1": "1000 TECHNOLOGY DRIVE", "city": "O", "state": "MO", "zip": "63304", "phone": "6362611313"}, "mail-address": {"street1": "CITIGROUP INC CORPORATE LAW DEPT", "street2": "425 PARK AVENUE 2ND FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10043"}}
UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 --------------

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

                        Date of Report: October 26, 2004
                       -----------------------------------
                        (Date of earliest event reported)

                       CITICORP MORTGAGE SECURITIES, INC.
                             (Packager and Servicer)
   (Issuer in Respect of the REMIC Pass-Through Certificates, Series 2004-8)
   --------------------------------------------------------------------------
               (Exact name of registrant as specified in charter)

   Delaware                 000-16107, 333-109722             13-3408717
 ----------------------------------------------------------------------------
  (State or other juris-       (Commission                 (I.R.S. Employer
 diction of organization)       File Nos.)                Identification No.)

   1000 Technology Drive, O'Fallon, Missouri                   63304
--------------------------------------------------          ----------
   (Address of principal executive offices)                 (Zip Code)

Registrant's Telephone Number, including area code: (636) 261-1313

--------------------------------------------------------------------------
(Former name, former address and former fiscal year, if changed since last
report.)
Item 8.01.     Other Events.

                       CITICORP MORTGAGE SECURITIES, INC.
                 REMIC Pass-Through Certificates, Series 2004-8
                 -----------------------------------------------

     Attached as Exhibit I are the Computational Materials (as defined in the
no-action letter dated May 20, 1994 issued by the Securities and Exchange
Commission to Kidder, Peabody Acceptance Corporation I, Kidder, Peabody & Co.
Incorporated and Kidder Structured Asset Corporation) and/or Structural Term
Sheets (as defined in the no-action letter dated February 17, 1995 issued by the
Securities and Exchange Commission to the Public Securities Association)
prepared by Citigroup Global Markets Inc. that are required to be filed
pursuant to such letters.

                                        2
SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                            CITICORP MORTGAGE SECURITIES, INC.
                                            (Registrant)

                                            By: /s/ Howard Darmstadter
                                               -------------------------
                                                    Howard Darmstadter
                                                    Assistant Secretary

Dated: October 26, 2004

                                       3
EXHIBIT INDEX

                                                                Paper (P) or
Exhibit No.                 Description                        Electronic (E)
-----------                 -----------                        --------------

     I             Computational Materials/Structural                 P
                   Term Sheets prepared Citigroup Global
                   Markets Inc.

                                       4