SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G


             Information Statement Pursuant to Rules 13d-1 and 13d-2
                    Under the Securities Exchange Act of 1934
                                (Amendment No. )*


                        Mace Security International, Inc.
                                (Name of Issuer)


                                  Common Stock
                         (Title of Class of Securities)

                                    554335208
                                 (CUSIP Number)


                                  May 26, 2004
             (Date of Event Which Requires Filing of This Statement)




Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

        [_]  Rule 13d-1(b)
        [X]  Rule 13d-1(c)
        [_]  Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).



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CUSIP No. 554335208                                           Page  2 of 9 Pages
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1. Name of Reporting Person:

        Langley Partners, L.P.
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2. Check the Appropriate Box if a Member of a Group:
                                                                 (a)  [_]
                                                                 (b)  [X]
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3. SEC Use Only

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4. Citizenship or Place of Organization: Delaware

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                          5. Sole Voting Power: -0-
Number of
Shares                    ------------------------------------------------------
Beneficially              6. Shared Voting Power: 1,098,000 (see Item 4)
Owned By
Each                      ------------------------------------------------------
Reporting                 7. Sole Dispositive Power:  -0-
Person
With                      ------------------------------------------------------
                          8. Shared Dispositive Power: 1,098,000 (see Item 4)

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9. Aggregate Amount Beneficially Owned by Each Reporting Person:

        1,098,000
--------------------------------------------------------------------------------
10. Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares:  [_]

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11. Percent of Class Represented by Amount in Row (9): 7.6%

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12. Type of Reporting Person: PN

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CUSIP No. 554335208                                           Page  3 of 9 Pages
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1. Name of Reporting Person:

        Langley Management, LLC
--------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group:
                                                                 (a)  [_]
                                                                 (b)  [X]
--------------------------------------------------------------------------------
3. SEC Use Only

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4. Citizenship or Place of Organization: Delaware

--------------------------------------------------------------------------------
                          5. Sole Voting Power: -0-
Number of
Shares                    ------------------------------------------------------
Beneficially              6. Shared Voting Power: 1,098,000 (see Item 4)
Owned By
Each                      ------------------------------------------------------
Reporting                 7. Sole Dispositive Power:  -0-
Person
With                      ------------------------------------------------------
                          8. Shared Dispositive Power: 1,098,000 (see Item 4)

--------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person:

        1,098,000
--------------------------------------------------------------------------------
10. Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares:  [_]

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

11. Percent of Class Represented by Amount in Row (9): 7.6%

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12. Type of Reporting Person: OO

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CUSIP No. 554335208                                           Page  4 of 9 Pages
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1. Name of Reporting Person:

        Langley Capital, LLC
--------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group:
                                                                 (a)  [_]
                                                                 (b)  [X]
--------------------------------------------------------------------------------
3. SEC Use Only

--------------------------------------------------------------------------------
4. Citizenship or Place of Organization: Delaware

--------------------------------------------------------------------------------
                          5. Sole Voting Power: -0-
Number of
Shares                    ------------------------------------------------------
Beneficially              6. Shared Voting Power: 1,098,000 (see Item 4)
Owned By
Each                      ------------------------------------------------------
Reporting                 7. Sole Dispositive Power:  -0-
Person
With                      ------------------------------------------------------
                          8. Shared Dispositive Power: 1,098,000 (see Item 4)

--------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person:

        1,098,000
--------------------------------------------------------------------------------
10. Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares:  [_]

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

11. Percent of Class Represented by Amount in Row (9): 7.6%

--------------------------------------------------------------------------------
12. Type of Reporting Person: OO

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CUSIP No. 554335208                                           Page  5 of 9 Pages
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1. Name of Reporting Person:

        Jeffrey Thorp
--------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group:
                                                                 (a)  [_]
                                                                 (b)  [X]
--------------------------------------------------------------------------------
3. SEC Use Only

--------------------------------------------------------------------------------
4. Citizenship or Place of Organization: United States

--------------------------------------------------------------------------------
                          5. Sole Voting Power: -0-
Number of
Shares                    ------------------------------------------------------
Beneficially              6. Shared Voting Power: 1,098,000 (see Item 4)
Owned By
Each                      ------------------------------------------------------
Reporting                 7. Sole Dispositive Power:  -0-
Person
With                      ------------------------------------------------------
                          8. Shared Dispositive Power: 1,098,000 (see Item 4)

--------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person:

        1,098,000
--------------------------------------------------------------------------------
10. Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares:  [_]

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

11. Percent of Class Represented by Amount in Row (9): 7.6%

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12. Type of Reporting Person: IN

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CUSIP No. 554335208                                           Page  6 of 9 Pages
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Item 1(a).        Name of Issuer:

                  Mace Security International, Inc. (the "Company").

Item 1(b).        Address of Issuer's Principal Executive Offices:

                  1000 Crawford Place
                  Suite 400
                  Mt. Laurel, NJ 08054

Item 2(a).        Name of Persons Filing:

                  (i) Langley Partners, L.P. ("Langley L.P."), (ii) Langley
                  Management, LLC, (iii) Langley Capital, LLC and (iv) Jeffrey
                  Thorp ("Thorp," together with Langley L.P., Langley
                  Management, LLC and Langley Capital, LLC, the "Reporting
                  Persons").

Item 2(b).        Address of Principal Business Office:

                  For each Reporting Person:

                  535 Madison Avenue
                  7th Floor
                  New York, NY 10022.

Item 2(c).        Citizenship:

                  See row 4 of each Reporting Persons' cover page.

Item 2(d).        Title of Class of Securities:

                  Common Stock, $.01 par value per share, of the Company

Item 2(e).        CUSIP Number:

                  554335208

Item 3.           Not applicable.

Item 4.           Ownership.

                  For each Reporting Person:

                  (a)      Amount beneficially owned:

                           1,098,000 shares of Common Stock as follows: (i)
                           915,000 shares of Common Stock are owned of record by
                           Langley L.P. and (ii) 183,000 shares of Common Stock
                           issuable, subject to certain limitations set forth in
                           the warrant agreement, to Langley L.P. upon exercise
                           of warrants.

                           Langley Capital, LLC is the general partner of
                           Langley L.P. Thorp is the sole member and manager of
                           Langley Capital, LLC. Langley Management, LLC is the
                           investment manager of Langley L.P. Thorp holds a
                           99.9% membership interest in Langley



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CUSIP No. 554335208                                           Page  7 of 9 Pages
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                           Management, LLC and is the sole manager thereof. As a
                           result, each of Langley Management, LLC, Langley
                           Capital, LLC and Thorp are considered to share the
                           power to vote or direct the vote of, and the power to
                           dispose or direct the disposition of, the shares of
                           Common Stock owned of record by Langley L.P. This
                           statement on Schedule 13G shall not be construed as
                           an admission that any of the Reporting Persons (other
                           than Langley L.P.) is the beneficial owner of the
                           Common Stock covered by this statement.

                  (b)      Percent of class:

                           7.6% of the total outstanding shares of Common Stock.
                           This percentage is based upon the 14,384,056 shares
                           of Common Stock issued and outstanding, which number
                           is calculated by adding (i) 13,286,056 (the number of
                           shares of Common Stock reported in the Form 10-Q for
                           the period ended March 31, 2004), (ii) 915,000 (the
                           number of shares of Common Stock issued to Langley
                           L.P. as reported on Form 8-K, filed on May 28, 2004)
                           and (iii) 183,000 (the number of shares of Common
                           Stock issuable to Langley L.P. upon exercise of its
                           warrants).

                  (c)      Number of shares to which each Reporting Person has:

                           (i)    Sole power to vote or direct the vote: -0-

                           (ii)   Shared power to vote or direct the vote:
                                  1,098,000

                           (iii)  Sole power to dispose or to direct the
                                  disposition of: -0-

                           (iv)   Shared power to dispose of or direct the
                                  disposition of: 1,098,000

Item 5.           Ownership of Five Percent or Less of a Class.

                  Not Applicable.

Item 6.           Ownership of More than Five Percent on Behalf of Another
                  Person.

                  Not Applicable.

Item 7.           Identification and Classification of the Subsidiary Which
                  Acquired the Security Being Reported By the Parent Holding
                  Company.

                  Not Applicable.

Item 8.           Identification and Classification of Members of the Group.

                  Not Applicable.

Item 9.           Notice of Dissolution of a Group.

                  Not Applicable.



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CUSIP No. 554335208                                           Page 8 of 9 Pages
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Item 10.          Certification.

                  By signing below I certify that, to the best of my knowledge
                  and belief, the securities referred to above were not acquired
                  and are not held for the purpose of or with the effect of
                  changing or influencing the control of the issuer of the
                  securities and were not acquired and are not held in
                  connection with or as a participant in any transaction having
                  that purpose or effect.





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CUSIP No. 554335208                                           Page  9 of 9 Pages
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                                    SIGNATURE

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

Dated:   June 7, 2004

                                          LANGLEY PARTNERS, L.P.


                                             By:  LANGLEY CAPITAL, LLC,
                                                  as General Partner


                                                  By: /s/ Jeffrey Thorp
                                                      --------------------------
                                                      Jeffrey Thorp, Manager


                                          LANGLEY MANAGEMENT, LLC


                                             By:  /s/ Jeffrey Thorp
                                                  ------------------------------
                                                  Jeffrey Thorp, Manager


                                          LANGLEY CAPITAL, LLC


                                             By:  /s/ Jeffrey Thorp
                                                  ------------------------------
                                                  Jeffrey Thorp, Manager


                                          /s/ Jeffrey Thorp
                                          --------------------------------------
                                          Jeffrey Thorp