SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934
(Amendment No.______)

Filed by the Registrant [    ]
Filed by a Party other than the Registrant [    ]

Check the appropriate box:

[  ]  Preliminary Proxy Statement
[  ]  Confidential, for Use of the Commission Only (as permitted by
      Rule 14a-6(e)(2))
[XX]  Definitive Proxy Statement
[  ]  Definitive Additional Materials
[  ]  Soliciting Material Pursuant to Sec. 240.14a-11(c) or
      Sec. 240.14a-12


                             CASH TRUST SERIES, INC.
 ...............................................................................
(Name of Registrant as Specified In Its Charter)


                               FEDERATED INVESTORS
- --------------------------------------------------------------------------------
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)


Payment of Filing Fee (Check the appropriate box):

[XX]  No filing fee required.
[     ] $125 per Exchange Act Rules 0-11(c)(1)(ii), 14a-6(i)(1), or 14a-6(i)(2)
      or Item 22(a)(2) of Schedule 14A.
[     ] $500 per each party to the controversy pursuant to Exchange Act Rule
      14a-6(i)(3).
[     ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

      1. Title of each class of securities to which transaction applies:

      2. Aggregate number of securities to which transaction applies:

      3. Per unit price or other underlying value of transaction computed
         pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
         filing fee is calculated and state how it was determined):

      4. Proposed maximum aggregate value of transaction:

      5. Total fee paid:

[  ]  Fee paid previously with preliminary proxy materials.

[     ] Check box if any part of the fee is offset as provided by Exchange Act
      Rule 0-11(a)(2) and identify the filing for which the offsetting fee was
      paid previously. Identify the previous filing by registration statement
      number, or the Form or Schedule and the date of its filing.






      1) Amount Previously Paid:
         ---------------------------------------------------------------

      2) Form, Schedule or Registration Statement No.:
         ---------------------------------------------------------------

      3) Filing Party:
         ---------------------------------------------------------------

      4) Date Filed:
         ---------------------------------------------------------------


                                 PROXY STATEMENT

                             CASH TRUST SERIES, INC.

                             Government Cash Series
                              Treasury Cash Series

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                             TO BE HELD MAY 15, 1998

      A special meeting of the shareholders of Government Cash Series and
Treasury Cash Series (individually referred to as the "Fund" and collectively
referred to as the "Funds"), portfolios of Cash Trust Series, Inc. (the
"Company") will be held at Federated Investors Tower, 19th Floor, 1001 Liberty
Avenue, Pittsburgh, Pennsylvania 15222-3779, at 2:00 p.m. (Eastern time), on May
15, 1998, for the following purposes:


            (1)   To elect three Directors.

          (2)  To transact  such other  business as may properly come before the
               meeting or any adjournment thereof.

      The Board of Directors has fixed February 26, 1998, as the record date for
determination of shareholders entitled to vote at the meeting.

                                                By Order of the Directors



                                                John W. McGonigle
                                                Secretary


March 16, 1998


- --------------------------------------------------------------------------------
SIGN, DATE AND RETURN THE ENCLOSED PROXY PROMPTLY TO AVOID ADDITIONAL EXPENSE.
- --------------------------------------------------------------------------------

YOU CAN HELP THE COMPANY AVOID THE  NECESSITY  AND EXPENSE OF SENDING  FOLLOW-UP
LETTERS TO ENSURE A QUORUM BY PROMPTLY  RETURNING THE ENCLOSED PROXY. IF YOU ARE
UNABLE TO ATTEND THE MEETING,  PLEASE MARK,  SIGN,  DATE AND RETURN THE ENCLOSED
PROXY SO THAT THE NECESSARY  QUORUM MAY BE REPRESENTED  AT THE SPECIAL  MEETING.
THE  ENCLOSED  ENVELOPE  REQUIRES  NO POSTAGE  IF MAILED IN THE  UNITED  STATES.
- --------------------------------------------------------------------------------




                                 PROXY STATEMENT

                             CASH TRUST SERIES, INC.

                             Government Cash Series
                              Treasury Cash Series
                            Federated Investors Funds
                              5800 Corporate Drive
                            Pittsburgh, PA 15237-7000


About the Proxy Solicitation and the Special Meeting

The enclosed proxy is solicited on behalf of the Board of Directors of the
Company (the "Board" or "Directors"). The proxies will be voted at the special
meeting of shareholders of the Company to be held on May 15, 1998, at Federated
Investors Tower, 19th Floor, 1001 Liberty Avenue, Pittsburgh, Pennsylvania
15222-3779, at 2:00 p.m. (such special meeting and any adjournment or
postponement thereof are referred to as the "Special Meeting").

      The cost of the solicitation, including the printing and mailing of proxy
materials, will be borne by Funds. In addition to solicitations through the
mails, proxies may be solicited by officers, employees, and agents of the Funds
or, if necessary, a communications firm retained for this purpose. Such
solicitations may be by telephone, telegraph, or otherwise. Any telephonic
solicitations will follow procedures designed to ensure accuracy and prevent
fraud, including requiring identifying shareholder information, recording the
shareholder's instructions, and confirming to the shareholder after the fact.
Shareholders who communicate proxies by telephone or by other electronic means
have the same power and authority to issue, revoke, or otherwise change their
voting instruction as currently exists for instructions communicated in written
form. The Funds will reimburse custodians, nominees, and fiduciaries for the
reasonable costs incurred by them in connection with forwarding solicitation
materials to be beneficial owners of shares held of record by such persons.

The purpose of the Special Meeting is set forth in the accompanying Notice. The
Directors know of no business other than that mentioned in the Notice that will
be presented for consideration at the Special Meeting. Should other business
properly be brought before the Special Meeting, proxies will be voted in
accordance with the best judgment of the persons named as proxies. This proxy
statement and the enclosed proxy card are expected to be mailed on or about
March 16, 1998, to shareholders of record at the close of business on February
26, 1998 (the "Record Date"). On the Record Date, Government Cash Series had
outstanding 610,527,272 shares of common stock and Treasury Cash Series had
outstanding 820,098,609 shares of common stock.

      The Funds' annual reports, which includes audited financial statements for
each Fund for the fiscal year ended May 31, 1997, was previously mailed to
shareholders. Requests for a semi-annual report for each Fund which contains
unaudited financial statements for the period ended November 30, 1997, may be
made in writing to the Company's principal executive offices at Federated
Investors Funds, 5800 Corporate Drive, Pittsburgh, Pennsylvania 15237-7000 or by
calling toll-free 1-800-341-7400.


                          ELECTION OF THREE DIRECTORS

     The  persons  named as proxies  intend to vote in favor of the  election of
Thomas G. Bigley, John E. Murray, Jr., and Nicholas P. Constantakis as Directors
of the Company.  All of the nominees are presently serving as Directors.  Please
see "Information about the Company" for current  biographical  information about
Messrs. Bigley, Murray, and Constantakis.

     Messrs. Bigley and Murray were appointed Directors on November 15, 1994 and
February 14, 1995,  respectively,  to fill vacancies resulting from the decision
to expand the size of the Board.  Mr.  Constantakis  was appointed a Director on
February 23, 1998, to fill the vacancy  created by the death of Mr. Gregor Meyer
on November 2, 1997.

     All Nominees  have  consented to continue to serve if elected.  If elected,
the Directors will hold office  without limit in time until death,  resignation,
retirement,  or  removal  or until the next  meeting  of  shareholders  to elect
Directors and the election and qualification of their successors.

      If any nominee for election as a Director named above shall by reason of
death or for any other reason become unavailable as a candidate at the Special
Meeting, votes pursuant to the enclosed proxy will be cast for a substitute
candidate by the proxies named on the proxy card, or their substitutes, present
and acting at the Special Meeting. Any such substitute candidate for election as
an interested Director shall be nominated by the Executive Committee. The
selection of any substitute candidate for election as a Director who is not an
interested person shall be made by a majority of the Directors who are not
interested persons of the Company. The Board has no reason to believe that any
nominee will become unavailable for election as a Director.


                          INFORMATION ABOUT THE COMPANY

Quorum and Voting Requirements

      Election of a Director requires the affirmative vote of a plurality of the
votes cast at the Special Meeting. A "plurality" is defined as more votes cast
for than against each Nominee.

      Any person giving a proxy has the power to revoke it any time prior to its
exercise by executing a superseding proxy or by submitting a written notice of
revocation to the Secretary of the Company. In addition, although mere
attendance at the Special Meeting will not revoke a proxy, a shareholder present
at the Special Meeting may withdraw his or her proxy and vote in person. All
properly executed and unrevoked proxies received in time for the Special Meeting
will be voted in accordance with the instructions contained in the proxies. If
no instruction is given, the persons named as proxies will vote the shares
represented thereby in favor of the matters set forth in the attached Notice.

      In order to hold the Special Meeting, a "quorum" of shareholders must be
present. Holders of one-third of the total number of outstanding shares of each
Fund of the Company, present in person or by proxy, shall be required to
constitute a quorum for the purpose of voting on the proposals made.

      For purposes of determining a quorum for transacting business at the
Special Meeting, abstentions and broker "non-votes" (that is, proxies from
brokers or nominees indicating that such persons have not received instructions
from the beneficial owner or other persons entitled to vote shares on a
particular matter with respect to which the brokers or nominees do not have
discretionary power) will be treated as shares that are present but which have
not been voted. For this reason, abstentions and broker non-votes will have the
effect of a "no" vote for purposes of obtaining the requisite approval of the
proposals.

      If a quorum is not present, the Special Meeting may be adjourned to a
later date by the affirmative vote of a majority of the shares present or
represented by proxy. In the event that a quorum is present but sufficient votes
in favor of one or more of the proposals have not been received, the persons
named as proxies may propose one or more adjournments of the Special Meeting to
permit further solicitations of proxies with respect to such proposal(s). Any
adjournments for this purpose will require the affirmative vote of a majority of
the shares cast in person or by proxy. at the session of the Special Meeting to
be adjourned. The persons named as proxies will vote those proxies which they
are entitled to vote FOR the proposal in favor of such an adjournment and will
vote those proxies required to be voted AGAINST the proposal against any
adjournment.. A shareholder vote may be taken on the proposals in this proxy
statement prior to any such adjournment if sufficient votes have been received
for approval.

About the Election of Directors

      When elected, the Directors will hold office without limit in time until
death, resignation, retirement, or removal or until the next meeting of
shareholders to elect Directors and the election and qualification of their
successors.

      Directors standing for election and Directors previously elected are
listed below with their addresses, birthdates, present positions with the
Company, and principal occupations during the past five years. The companies or
organizations related to the principal occupations of Directors standing for
election are not affiliated with the Company.


Directors Standing for Election

Thomas G. Bigley
15 Old Timber Trail
Pittsburgh, PA

Birthdate: February 3, 1934

Director

Chairman of the Board, Children's Hospital of Pittsburgh; formerly, Senior
Partner, Ernst & Young LLP; Director, MED 3000 Group, Inc.; Director, Member of
Executive Committee, University of Pittsburgh; Director or Trustee of the Funds.

Nicholas P. Constantakis
175 Woodshire Drive
Pittsburgh, PA
Birthdate:  September 3, 1939

Director

Formerly, Partner, Andersen Worldwide SC; Director or Trustee of the Funds.


John E. Murray, Jr., J.D., S.J.D.
President, Duquesne University
Pittsburgh, PA

Birthdate: December 20, 1932

Director

President, Law Professor, Duquesne University; Consulting Partner, Mollica &
Murray; Director or Trustee of the Funds.








Previously Elected Directors

John F. Donahue#*
Federated Investors Tower
Pittsburgh, PA

Birthdate: July 28, 1924

Chairman and Director

Chairman  and  Trustee,  Federated  Investors,   Federated  Advisers,  Federated
Management,  and Federated Research;  Chairman and Director,  Federated Research
Corp. and Federated Global Research Corp.;  Chairman,  Passport Research,  Ltd.;
Chief Executive Officer and Director or Trustee of the Funds. Mr. Donahue is the
father of J. Christopher  Donahue,  Executive Vice President and Director of the
Company.


John T. Conroy, Jr.
Wood/IPC Commercial Department
John R. Wood and Associates, Inc., Realtors
3255 Tamiami Trail North
Naples, FL
Birthdate: June 23, 1937

Director

President,  Investment Properties  Corporation;  Senior Vice-President,  John R.
Wood and Associates,  Inc., Realtors;  Partner or Trustee in private real estate
ventures in Southwest Florida; formerly,  President, Naples Property Management,
Inc. and Northgate Village Development  Corporation;  Director or Trustee of the
Funds.


William J. Copeland
One PNC Plaza - 23rd Floor
Pittsburgh, PA

Birthdate: July 4, 1918

Director

Director and Member of the Executive Committee, Michael Baker, Inc.; formerly,
Vice Chairman and Director, PNC Bank, N.A., and PNC Bank Corp.; Director, Ryan
Homes, Inc.; Director or Trustee of the Funds.


J. Christopher Donahue*
Federated Investors Tower
Pittsburgh, PA

Birthdate: April 11, 1949

Executive Vice President and Director


President and Trustee, Federated Investors, Federated Advisers, Federated
Management, and Federated Research; President and Director, Federated Research
Corp. and Federated Global Research Corp.; President, Passport Research, Ltd.;
Trustee, Federated Shareholder Services Company and Federated Shareholder
Services; Director, Federated Services Company; President or Executive Vice
President of the Funds; Director or Trustee of some of the Funds. Mr. Donahue is
the son of John F. Donahue, Chairman and Director of the Company.







James E. Dowd
571 Hayward Mill Road
Concord, MA

Birthdate: May 18, 1922

Director

Attorney-at-law;  Director, The Emerging Germany Fund, Inc.; Director or Trustee
of the Funds.


Lawrence D. Ellis, M.D.*
3471 Fifth Avenue, Suite 1111
Pittsburgh, PA

Birthdate: October 11, 1932

Director

Professor of Medicine, University of Pittsburgh; Medical Director, University of
Pittsburgh Medical Center--Downtown; Member, Board of Directors, University of
Pittsburgh Medical Center; formerly, Hematologist, Oncologist, and Internist,
Presbyterian and Montefiore Hospitals; Director or Trustee of the Funds.


Edward L. Flaherty, Jr.#
Miller, Ament, Henny & Kochuba
205 Ross Street
Pittsburgh, PA

Birthdate: June 18, 1924

Director

Attorney of Counsel, Miller, Ament, Henny & Kochuba; Director, Eat'N Park
Restaurants, Inc.; formerly, Counsel, Horizon Financial, F.A., Western Region;
Director or Trustee of the Funds.


Peter E. Madden
One Royal Palm Way
100 Royal Palm Way
Palm Beach, FL

Birthdate: March 16, 1942

Director

Consultant; Former State Representative, Commonwealth of Massachusetts;
formerly, President, State Street Bank and Trust Company and State Street Boston
Corporation; Director or Trustee of the Funds.


Wesley W. Posvar
1202 Cathedral of Learning
University of Pittsburgh
Pittsburgh, PA

Birthdate: September 14, 1925

Director

Professor, International Politics; Management Consultant; Trustee, Carnegie
Endowment for International Peace, RAND Corporation, Online Computer Library
Center, Inc., National Defense University and U.S. Space Foundation; President
Emeritus, University of Pittsburgh; Founding Chairman, National Advisory Council
for Environmental Policy and Technology, Federal Emergency Management Advisory
Board and Czech Management Center, Prague; Director or Trustee of the Funds.


Marjorie P. Smuts
4905 Bayard Street
Pittsburgh, PA

Birthdate: June 21, 1935

Director

Public  Relations/Marketing/Conference  Planning;  Director  or  Trustee  of the
Funds.

* This  Director is deemed to be an  "interested  person" as defined in the 1940
Act.

# Member of the Executive Committee. The Executive Committee of the Board of
Directors handles the responsibilities of the Board between meetings of the
Board.

As referred to in the preceding table, "The Funds" or "Funds" includes the
following investment companies: 111 Corcoran Funds; Automated Government Money
Trust; Blanchard Funds; Blanchard Precious Metals Fund, Inc.; Cash Trust Series
II; Cash Trust Series, Inc.; DG Investor Series; Edward D. Jones & Co. Daily
Passport Cash Trust; Federated Adjustable Rate U.S. Government Fund, Inc.;
Federated American Leaders Fund, Inc.; Federated ARMs Fund; Federated Core
Trust; Federated Equity Funds; Federated Equity Income Fund, Inc.; Federated
Fund for U.S. Government Securities, Inc.; Federated GNMA Trust; Federated
Government Income Securities, Inc.; Federated Government Trust; Federated High
Income Bond Fund, Inc.; Federated High Yield Trust; Federated Income Securities
Trust; Federated Income Trust; Federated Index Trust; Federated Institutional
Trust; Federated Insurance Series; Federated Investment Portfolios; Federated
Investment Trust; Federated Master Trust; Federated Municipal Opportunities
Fund, Inc.; Federated Municipal Securities Fund, Inc.; Federated Municipal
Trust; Federated Short-Term Municipal Trust; Federated Short-Term U.S.
Government Trust; Federated Stock and Bond Fund, Inc.; Federated Stock Trust;
Federated Tax-Free Trust; Federated Total Return Series, Inc.; Federated U.S.
Government Bond Fund; Federated U.S. Government Securities Fund: 1-3 Years;
Federated U.S. Government Securities Fund: 2-5 Years; Federated U.S. Government
Securities Fund: 5-10 Years; Federated Utility Fund, Inc.; First Priority Funds;
Fixed Income Securities, Inc.; High Yield Cash Trust; Intermediate Municipal
Trust; International Series, Inc.; Investment Series Funds, Inc.; Investment
Series Trust; Liberty Term Trust, Inc. - 1999; Liberty U.S. Government Money
Market Trust; Liquid Cash Trust; Managed Series Trust; Money Market Management,
Inc.; Money Market Obligations Trust; Money Market Obligations Trust II; Money
Market Trust; Municipal Securities Income Trust; Newpoint Funds; RIMCO Monument
Funds; Targeted Duration Trust; Tax-Free Instruments Trust; The Planters Funds;
The Virtus Funds; Trust for Financial Institutions; Trust for Government Cash
Reserves; Trust for Short-Term U.S. Government Securities; Trust for U.S.
Treasury Obligations; WesMark Funds; WCT Funds; and World Investment Series,
Inc.


Share Ownership of the Funds
Officers and Directors of the Company owns less than 1% of the Company's
outstanding shares.

At the close of business on the Record Date, the following persons owned, to the
knowledge of management, more than 5% of the outstanding shares of:

Government Cash Series: Bank of America NT&SA, Los Angeles, California, acting
in various capacities for numerous accounts, was owner of record of 88,778,312
shares (14.54%); BHC Securities, Inc., Philadelphia, Pennsylvania, acting in
various capacities for numerous accounts, was owner of record of 58,942,655
shares (9.65%); Kirpet Co., Omaha, Nebraska, acting in various capacities for
numerous accounts, was owner of record of 50,713,229 shares (8.30%); and Scott &
Stringfellow, Inc., Richmond, Virginia, acting in various capacities for
numerous accounts, was owner of record of 38,207,830 shares (6.25%).






Treasury Cash Series: Scott & Stringfellow, Inc., Richmond, Virginia, acting in
various capacities for numerous accounts, was owner of record of 142,278,087
shares (17.34%); BHC Securities, Inc., Philadelphia, Pennsylvania, acting in
various capacities for numerous accounts, was owner of record of 106,578,153
shares (12.99%); Compass Investment Services Corp., Melville, New York, acting
in various capacities for numerous accounts, was owner of record of 91,736,450
shares (11.18%) and Primevest Financial Services, St. Cloud, Minnesota, acting
in various capacities for numerous accounts, was owner of record of 44,331,522
shares (5.40%).

Director Compensation




                                      

                         Aggregate
Name,                  Compensation
Position With              From                  Total Compensation Paid
Company                  Company*#                   From Fund Complex
- --------------------------------------------------------------------------------
John F. Donahue,            $0          $0 for the Fund and 56 other investment
Chairman and Director                   companies in the Fund Complex
Thomas G. Bigley,       $4,068.51       $108,725 for the Fund and 56 other investment
Director                                companies in the Fund Complex
John T. Conroy, Jr.,    $4,476.02       $119,615 for the Fund and 56 other investment
Director                                companies in the Fund Complex
Nicholas P. Constantakis    $0          $0 for the Trust and 36 other investment
Trustee                                 companies in the Complex

William J. Copeland,    $4,476.02       $119,615 for the Fund and 56 other investment
Director                                companies in the Fund Complex
J. Christopher Donahue,     $0          $0 for the Fund and 18 other investment
Exec. V. Pres. and Director             companies in the Fund Complex
James E. Dowd,          $4,476.02       $119,615 for the Fund and 56 other investment
Director                                companies in the Fund Complex
Lawrence D. Ellis, M.D.,$4,068.51       $108,725 for the Fund and 56 other investment
Director                                companies in the Fund Complex
Edward L. Flaherty, Jr.,$4,476.02       $119,615 for the Fund and 56 other investment
Director                                companies in the Fund Complex
Peter E. Madden,        $4,068.51       $108,725 for the Fund and 56 other investment
Director                                companies in the Fund Complex
John E. Murray, Jr.,    $4,068.51       $108,725 for the Fund and 56 other investment
Director                                companies in the Fund Complex
Wesley W. Posvar,       $4,068.51       $108,725 for the Fund and 56 other investment
Director                                companies in the Fund Complex
Marjorie P. Smuts,      $4,068.51       $108,725 for the Fund and 56 other investment
Director                                companies in the Fund Complex



* Information is furnished for the fiscal year ended May 31, 1997.

# The aggregate compensation is provided for the Company which is comprised of
four portfolios.

  The information is provided for the last calendar year.






      During the fiscal year ended May 31, 1997, there were four meetings of the
Board of Directors. The interested Directors, other than Dr. Ellis, do not
receive fees from the Company. Dr. Ellis is an interested person by reason of
the employment of his son-in-law by Federated Securities Corp. All Directors
were reimbursed for expenses for attendance at Board of Directors meetings.

      Other than its Executive Committee, the Company also has an Audit
Committee which consists of Messrs. Flaherty, Conroy, Copeland, and Dowd. The
function of the Audit Committee is to assist the Board of Directors in
fulfilling its duties relating to the Company's accounting and financial
reporting practices and to serve as a direct line of communication between the
Board of Directors and the independent auditors. The specific functions of the
Audit Committee include recommending the engagement or retention of the
independent auditors, reviewing with the independent auditors the plan and the
results of the auditing engagement, approving professional services provided by
the independent auditors prior to the performance of such services, considering
the range of audit and non-audit fees, reviewing the independence of the
independent auditors, reviewing the scope and results of the Company's
procedures for internal auditing, and reviewing the Company's system of internal
accounting controls. During the fiscal year ended May 31, 1997, there were four
meetings of the Audit Committee. All of the members of the Audit Committee were
present for each meeting.

      Messrs. Flaherty, Conroy, Copeland, and Dowd serve on the Audit Committee.
These Directors are not interested Directors of the Company. During the fiscal
year ended May 31, 1997, there were four meetings of the Audit Committee. All of
the members of the Audit Committee were present for each meeting. Each member of
the Audit Committee receives an annual fee of $100 plus $25 for attendance at
each meeting and is reimbursed for expenses of attendance.

Officers of the Company

      The executive officers of the Company are elected annually by the Board of
Directors. Each officer holds the office until qualification of his successor.
The names and birthdates of the executive officers of the Company and their
principal occupations during the last five years are as follows:

John F. Donahue#*
Federated Investors Tower
Pittsburgh, PA

Birthdate: July 28, 1924

Chairman and Director


Chairman  and  Trustee,  Federated  Investors,   Federated  Advisers,  Federated
Management,  and Federated Research;  Chairman and Director,  Federated Research
Corp. and Federated Global Research Corp.;  Chairman,  Passport Research,  Ltd.;
Chief Executive Officer and Director or Trustee of the Funds. Mr. Donahue is the
father of J. Christopher  Donahue,  Executive Vice President and Director of the
Company.

Richard B. Fisher
Federated Investors Tower
Pittsburgh, PA

Birthdate: May 17, 1923

President

Executive Vice President and Trustee, Federated Investors; Chairman and
Director, Federated Securities Corp.; President or Vice President of some of the
Funds; Director or Trustee of some of the Funds.








J. Christopher Donahue*
Federated Investors Tower
Pittsburgh, PA

Birthdate: April 11, 1949

Executive Vice President and Director


President and Trustee, Federated Investors, Federated Advisers, Federated
Management, and Federated Research; President and Director, Federated Research
Corp. and Federated Global Research Corp.; President, Passport Research, Ltd.;
Trustee, Federated Shareholder Services Company and Federated Shareholder
Services; Director, Federated Services Company; President or Executive Vice
President of the Funds; Director or Trustee of some of the Funds. Mr. Donahue is
the son of John F. Donahue, Chairman and Director of the Company.

Edward C. Gonzales
Federated Investors Tower
Pittsburgh, PA

Birthdate: October 22, 1930

Executive Vice President

Vice Chairman, Treasurer, and Trustee, Federated Investors; Vice President,
Federated Advisers, Federated Management, Federated Research, Federated Research
Corp., Federated Global Research Corp. and Passport Research, Ltd.; Executive
Vice President and Director, Federated Securities Corp.; Trustee, Federated
Shareholder Services Company; Trustee or Director of some of the Funds;
President, Executive Vice President and Treasurer of some of the Funds.


John W. McGonigle
Federated Investors Tower
Pittsburgh, PA

Birthdate: October 26, 1938

Executive Vice President, Secretary, and Treasurer

Executive Vice President, Secretary, and Trustee, Federated Investors; Trustee,
Federated Advisers, Federated Management, and Federated Research; Director,
Federated Research Corp. and Federated Global Research Corp.; Trustee, Federated
Shareholder Services Company; Director, Federated Services Company; President
and Trustee, Federated Shareholder Services; Director, Federated Securities
Corp.; Executive Vice President and Secretary of the Funds; Treasurer of some of
the Funds.

None of the Officers of the Company received salaries from the Company during
the fiscal year ended May 31, 1997.

      Federated Services Company, a subsidiary of Federated Investors, is the
Company's administrator and provides administrative personnel and services to
the Funds for a fee as described in the prospectus. For the fiscal year ended
May 31, 1997, Federated Services Company earned $417,215 from Government Cash
Series and $531,651 from Treasury Cash Series.



          OTHER MATTERS AND DISCRETION OF ATTORNEYS NAMED IN THE PROXY


     The Company is not required, and does not intend, to hold annual meetings
of shareholders. Shareholders wishing to submit proposals for consideration for
inclusion in a proxy statement for the next meeting of shareholders should send
their written proposals to Cash Trust Series, Inc., Federated Investors Funds,
5800 Corporate Drive, Pittsburgh, Pennsylvania 15237-7000, so that they are
received within a reasonable time before any such meeting.






      No business other than the matter described above is expected to come
before the Special Meeting, but should any other matter requiring a vote of
shareholders arise, including any question as to an adjournment or postponement
of the Special Meeting, the persons named on the enclosed proxy card will vote
on such matters according to their best judgment in the interests of the
Company.



SHAREHOLDERS                                                 ARE REQUESTED TO
                                                             COMPLETE, DATE AND
                                                             SIGN THE ENCLOSED
                                                             PROXY CARD AND
                                                             RETURN IT IN THE
                                                             ENCLOSED ENVELOPE,
                                                             WHICH NEEDS NO
                                                             POSTAGE IF MAILED
                                                             IN THE UNITED
                                                             STATES.

By Order of the Directors


                                                               John W. McGonigle
                                                                       Secretary
March 16, 1998





                             CASH TRUST SERIES, INC.

                             Government Cash Series
                              Treasury Cash Series

Investment Adviser
FEDERATED ADVISERS
Federated Investors Tower
1001 Liberty Avenue
Pittsburgh, Pennsylvania 15222-3779

Distributor
FEDERATED SECURITIES CORP.
Federated Investors Tower
1001 Liberty Avenue
Pittsburgh, Pennsylvania 15222-3779

Administrator
FEDERATED SERVICES COMPANY
Federated Investors Tower
1001 Liberty Avenue
Pittsburgh, Pennsylvania 15222-3779

























Cusip 147551204
Cusip 147551402
(3/98)



KNOW ALL PERSONS BY THESE PRESENTS that the undersigned Shareholders of
Government Cash Series, a portfolio of Cash Trust Series, Inc. (the "Company")
hereby appoint Nicholas J. Seitanakis, Patricia F. Conner, Marie M. Hamm, Carol
B. Kayworth, and Elisabeth A. Miller, or any one of them, true and lawful
attorneys, with the power of substitution of each, to vote all shares of
Government Cash Series which the undersigned is entitled to vote at the Special
Meeting of Shareholders to be held on May 15, 1998, at Federated Investors
Tower, Pittsburgh, Pennsylvania, at 2:00 p.m., and at any adjournment thereof.

The attorneys named will vote the shares represented by this proxy in accordance
with the choices made on this ballot. If no choice is indicated as to the item,
this proxy will be voted affirmatively on the matters. Discretionary authority
is hereby conferred as to all other matters as may properly come before the
Special Meeting or any adjournment thereof.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF CASH TRUST
SERIES, INC. THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED IN THE MANNER
DIRECTED BY THE UNDERSIGNED SHAREHOLDER. IF NO DIRECTION IS MADE, THIS PROXY
WILL BE VOTED "FOR" THE PROPOSALS.

Proposal 1 To elect  Thomas G.  Bigley,  John E.  Murray,  Jr.,  and Nicholas P.
Constantakis as Directors of the Company

                        FOR                     [   ]
                        AGAINST                 [   ]
                        WITHHOLD AUTHORITY
                              TO VOTE           [   ]
                        FOR ALL EXCEPT          [   ]
                  If you do not wish your shares to be voted "FOR" a particular
                  nominee, mark the "For All Except" box and strike a line
                  through the nominee(s') name. Your shares will be voted for
                  the remaining nominees.

YOUR VOTE IS IMPORTANT
Please complete, sign and return                  _____________________
this card as soon as possible.                                Date
Mark with an X in the box.                  _____________________
                                                                       Signature

                                                        ------------------------
                                                        Signature (Joint Owners)


Please sign this proxy exactly as your name appears on the books of the Company.
Joint owners should each sign personally. Directors and other fiduciaries should
indicate the capacity in which they sign, and where more than one name appears,
a majority must sign. If a corporation, this signature should be that of an
authorized officer who should state his or her title.







KNOW ALL PERSONS BY THESE PRESENTS that the undersigned Shareholders of Treasury
Cash Series, a portfolio of Cash Trust Series, Inc. (the "Company") hereby
appoint Nicholas J. Seitanakis, Patricia F. Conner, Marie M. Hamm, Carol B.
Kayworth, and Elisabeth A. Miller, or any one of them, true and lawful
attorneys, with the power of substitution of each, to vote all shares of
Treasury Cash Series which the undersigned is entitled to vote at the Special
Meeting of Shareholders to be held on May 15, 1998, at Federated Investors
Tower, Pittsburgh, Pennsylvania, at 2:00 p.m., and at any adjournment thereof.

The attorneys named will vote the shares represented by this proxy in accordance
with the choices made on this ballot. If no choice is indicated as to the item,
this proxy will be voted affirmatively on the matters. Discretionary authority
is hereby conferred as to all other matters as may properly come before the
Special Meeting or any adjournment thereof.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF CASH TRUST
SERIES, INC. THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED IN THE MANNER
DIRECTED BY THE UNDERSIGNED SHAREHOLDER. IF NO DIRECTION IS MADE, THIS PROXY
WILL BE VOTED "FOR" THE PROPOSALS.

Proposal 1 To elect  Thomas G.  Bigley,  John E.  Murray,  Jr.,  and Nicholas P.
Constantakis as Directors of the Company

                        FOR                     [   ]
                        AGAINST                 [   ]
                        WITHHOLD AUTHORITY
                              TO VOTE           [   ]
                        FOR ALL EXCEPT          [   ]
                  If you do not wish your shares to be voted "FOR" a particular
                  nominee, mark the "For All Except" box and strike a line
                  through the nominee(s') name. Your shares will be voted for
                  the remaining nominees.

YOUR VOTE IS IMPORTANT
Please complete, sign and return               _____________________
this card as soon as possible.                             Date
Mark with an X in the box.               _____________________
                                                                       Signature

                                                        ------------------------
                                                        Signature (Joint Owners)


Please sign this proxy exactly as your name appears on the books of the Company.
Joint owners should each sign personally. Directors and other fiduciaries should
indicate the capacity in which they sign, and where more than one name appears,
a majority must sign. If a corporation, this signature should be that of an
authorized officer who should state his or her title.