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: March 28, 2001
                       ----------------------------------
                        (Date of earliest event reported)


                       CITICORP MORTGAGE SECURITIES, INC.
                             (Packager and Servicer)
    (Issuer in Respect of the REMIC Pass-Through Certificates, Series 2001-4)
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               (Exact name of registrant as specified in charter)


   Delaware                     333-72459                     13-3408713
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  (State or other juris-       (Commission                 (I.R.S. Employer
 diction of organization)       File Nos.)                Identification No.)


12855 North Outer Forty Drive, St. Louis, Missouri            63141
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   (Address of principal executive offices)                 (Zip Code)


Registrant's Telephone Number, including area code: (314) 851-6305

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


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Item 2.   Acquisition or Disposition of Assets.


                       CITICORP MORTGAGE SECURITIES, INC.
                 REMIC Pass-Through Certificates, Series 2001-4
                 ----------------------------------------------

                                March 28, 2001

                    DETAILED DESCRIPTION OF THE MORTGAGE POOL
                    -----------------------------------------
                         AND THE MORTGAGED PROPERTIES(1)
                         -------------------------------

      On March 28, 2001, Citicorp Mortgage Securities, Inc. ("CMSI")
transferred to the Trustee Mortgage Loans evidenced by Mortgage Notes with an
aggregate Adjusted Balance outstanding (after deducting principal payments due
on or before March 1, 2001) as of March 1, 2001 of $446,280,748.73. The
Mortgage Loans that are Relocation Loans, the "Relocation Mortgage Loans", have
an aggregate Adjusted Balance outstanding (after deducting principal payments
due on or before March 1, 2001) as of March 1, 2001 of $65,194,670.62 and
the Mortgage Loans that are not Relocation Loans, the "Standard Mortgage Loans",
have an aggregate Adjusted Balance outstanding (after deducting principal
payments due on or before March 1, 2001) as of March 1, 2001 of
$381,086,078.11. The Mortgage Loans were delivered in exchange for the
Certificates, authenticated by the Trustee, evidencing 100% of the regular
interests in the Trust. Distributions on the Certificates will be made by The
Bank of New York, as paying agent, by wire transfer or by such other means as
the person entitled thereto and CMSI shall agree. CMSI may repurchase all the
Mortgage Loans remaining in the Mortgage Pool pursuant to the Pooling Agreement
if at the time of repurchase the aggregate Adjusted Balance of such Mortgage
Loans is less than $22,314,037.44. Information below is provided with respect to
the Standard Mortgage Loans, the Relocation Mortgage Loans and/or all Mortgage
Loans included in the Mortgage Pool as indicated.

      The total number of all Mortgage Loans as of March 1, 2001 was 1068,
consisting of 903 Standard Mortgage Loans and 165 Relocation Mortgage Loans. The
weighted average interest rates on the Standard Mortgage Loans, the Relocation
Mortgage Loans and all Mortgage Loans (in each case, before deduction of the
servicing fee) (the "Note Rates") as of March 1, 2001 was 7.540%, 7.267% and
7.500%, respectively. The weighted average remaining terms to stated maturity as
of March 1, 2001 of the Standard Mortgage Loans, the Relocation Mortgage Loans
and all Mortgage Loans were 358.02 months, 357.90 months and 358.00 months,
respectively. All Mortgage Loans have original maturities of at least 20 but no
more than 30 years. None of the Standard Mortgage Loans or the Relocation
Mortgage Loans were originated prior to June 1, 1999 and January 1, 2000,
respectively, or after March 1, 2001. The weighted average original terms to
stated maturity as of March 1, 2001 of the Standard Mortgage Loans, the
Relocation Mortgage Loans and all Mortgage Loans were 359.56 months, 360.00
months and 359.62 months, respectively.

      None of the Mortgage Loans has a scheduled maturity later than March 1,
2031. Each of the Standard Mortgage Loans and the Relocation Mortgage Loans had
an original principal balance of not less than $188,695 and $277,750,
respectively, nor more than $1,047,000 and $700,000, respectively. Standard
Mortgage Loans, Relocation Mortgage Loans and all Mortgage Loans having
aggregate Adjusted Balances of $15,557,538, $5,849,063 and $21,406,601,
respectively, as of March 1, 2001 had loan-to-value ratios at origination in
excess of 80%, but no Mortgage Loans had loan-to-value ratios in excess of 95%.
The weighted average loan-to-value ratios at origination of the Standard
Mortgage Loans, the Relocation Mortgage Loans and all Mortgage Loans, as of
March 1, 2001 were 71.6%, 74.7% and 72.0%, respectively. No more than
$2,586,985, $1,807,312 and $2,970,392, respectively, of the Standard Mortgage
Loans, the Relocation Mortgage Loans or all Mortgage Loans were secured by
Mortgaged Properties located in any one zip code. At least 98%(2), 100% and 99%,
respectively, of the Standard Mortgage Loans, Relocation Mortgage Loans and all
Mortgage Loans were secured by Mortgaged Properties determined by CitiMortgage,
Inc. to be the primary residence of the borrower ("homeowner"). The sole basis
for such determination is either (a) a representation by the homeowner at
origination of the Mortgage Loan that the

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1     Capitalized terms used herein and not otherwise defined have the meaning
      assigned thereto in the Prospectus dated March 26, 2001 (consisting
      of a Prospectus Supplement dated March 26, 2001 and a Core Prospectus
      dated March 23, 2001), relating to the REMIC Pass-Through Certificates,
      Series 2001-4.

2     Such Percentages are expressed as a percentage of the aggregate Adjusted
      Balance of the Mortgage Loans having such characteristics relative to the
      Adjusted Balance of all Mortgage Loans.


<PAGE>


underlying property will be used for a period of at least 6 months every year or
that he or she intends to use the underlying property as his or her primary
residence, or (b) that the address of the underlying property is the homeowner's
mailing address as reflected in Originator's records. No more than 1% of the
Standard Mortgage Loans and none of the Relocation Mortgage Loans are secured by
investment properties.

      At least 99%, 57% and 93%, respectively, of the Standard Mortgage Loans,
the Relocation Mortgage Loans and all Mortgage Loans will be Mortgage Loans
originated using loan underwriting policies which require, among other things,
proof of income and liquid assets and telephone verification of employment, or
are refinanced Mortgage Loans originated using alternative or streamlined
underwriting policies. No more than 1%, 43% and 7%, respectively, of the
Standard Mortgage Loans, the Relocation Mortgage Loans or all Mortgage Loans,
will be Mortgage Loans originated using a loan underwriting policy, which among
other things, requires verification of employment and may require proof of
liquid assets, but does not require verification of income as stated on the loan
application. No more than 34%, 2% and 30%, respectively, of the Standard
Mortgage Loans, the Relocation Mortgage Loans or all Mortgage Loans will be
refinanced Mortgage Loans originated using alternative or streamlined
underwriting policies. See "Mortgage loan underwriting" in the Prospectus.

      All of the Mortgage Loans which had loan-to-value ratios greater than 80%
at origination had primary mortgage insurance as of such date. In the case of
the Mortgage Loans for which Additional Collateral (as defined in the Pooling
Agreement) was pledged, all of which were Standard Mortgage Loans, taken as a
group:

      (1) the number of such loans is 3;

      (2) such loans have an aggregate Adjusted Balance of $1,249,729;

      (3) the weighted average loan-to-value ratio of such loans, taking into
      account the loanable value of the additional pledged collateral, is
      79.8% and

      (4) the weighted average loan-to-value ratio of such loans, without
      taking into account the loanable value of the additional pledged
      collateral, is 99.9%.

      Standard Discount Mortgage Loans will consist of the Standard Mortgage
Loans with Net Note Rates (NNRs) less than 7.000%. Standard Premium Mortgage
Loans will consist of the Standard Mortgage Loans with NNRs greater than or
equal to 7.000%. The aggregate Adjusted Balances outstanding as of the Cut-off
Date of the Standard Discount Mortgage Loans and the Standard Premium Mortgage
Loans were $59,014,137 and $322,071,941, respectively. The weighted average Note
Rates of the Standard Discount Mortgage Loans and the Standard Premium Mortgage
Loans, as of the Cut-off Date, were 6.954% and 7.648%, respectively. The
weighted average remaining terms to stated maturity of the Standard Discount
Mortgage Loans and the Standard Premium Mortgage Loans, as of the Cut-off Date,
were 358.21 months and 357.98 months, respectively.

      Relocation Discount Mortgage Loans will consist of the Relocation Mortgage
Loans with NNRs less than 6.500%. Relocation Premium Mortgage Loans will consist
of Relocation Mortgage Loans with NNRs greater than or equal to 6.500%. The
aggregate Adjusted Balances outstanding as of the Cut-off Date of the Relocation
Discount Mortgage Loans and the Relocation Premium Mortgage Loans were
$6,137,902 and $59,056,769, respectively. The weighted average Note Rates of
the Relocation Discount Mortgage Loans and the Relocation Premium Mortgage
Loans, as of the Cut-off Date, were 6.611% and 7.335%, respectively. The
weighted average remaining terms to stated maturity of the Relocation Discount
Mortgage Loans and the Relocation Premium Mortgage Loans, as of the Cut-off
Date, were 359.24 months and 357.77 months, respectively.


<PAGE>


      The Special Hazard Loss Amount as of March 1, 2001 was $3,843,222.97.

      The Fraud Loss Amount as of March 1, 2001 was $4,462,807.49.

      The Bankruptcy Loss Amount as of March 1, 2001  was $119,418.95.

      The aggregate Initial Principal Amount of the Class A Certificates as of
March 1, 2001 was $431,776,530.00.

      The aggregate Initial Principal Amount of the Class M Certificates as of
March 1, 2001 was $6,694,000.00.

      The aggregate Initial Principal Amount of the Class B-1 Certificates as of
March 1, 2001 was $2,900,000.00.

      The aggregate Initial Principal Amount of the Class B-2 Certificates as of
March 1, 2001 was $1,785,000.00.

      The aggregate Initial Principal Amount of the Class B-3 Certificates as of
March 1, 2001 was $1,339,000.00.

      The aggregate Initial Principal Amount of the Class B-4 Certificates as of
March 1, 2001 was $893,000.00.

      The aggregate Initial Principal Amount of the Class B-5 Certificates as of
March 1, 2001 was $893,218.73.

      The Subordinated Certificate Percentage is 3.250021151769%.*

      The Class M Subordination Percentage is 1.750068483174%.*

      The Class B-1 Subordination Percentage is 1.100253314527%.*

      The Class B-2 Subordination Percentage is 0.700280874515%.*

      The Class B-3 Subordination Percentage is 0.400245525957%.*

      The Class B-4 Subordination Percentage is 0.200147268853%.*


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*     Equal to the Initial Principal Amount thereof divided by the aggregate
      Adjusted Balance of the Mortgage Loans.


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                                   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: March 28, 2001