3.875% COLLATERAL TRUST BOND DUE 2015

Exhibit 4.2

      Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York Corporation (“DTC”), to the Company or its agent for registration of transfer, exchange, or payment, and any certificate issued is registered in the name of Cede & Co. or in such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest herein.

3.875% COLLATERAL TRUST BOND DUE 2015

          National Rural Utilities Cooperative Finance Corporation, a District of Columbia cooperative association (hereinafter called the “Company”, which term includes any successor corporation under the Indenture referred to on the reverse hereof), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of $250,000,000 on the Maturity Date set forth above; and to pay interest thereon from the Issue Date set forth above at the Certificate Interest Rate set forth above, until the principal hereof is paid or made available for payment.

          Interest on the Bonds will be payable on March 16 and September 16 of each year commencing on March 16, 2010 to the persons in whose names such Bonds are registered at the close of business on the fifteenth calendar day preceding the payment date, or if not a Business Day, the next succeeding Business Day. Interest on the Bonds will accrue from and including the date of issue or from and including the last date in respect of which interest has been paid, as the case may be, to, but excluding, the relevant interest payment date, date of redemption or the date

of maturity, as the case may be. Interest on the Bonds will be computed on the basis of a 360-day year of twelve 30-day months.

          If any of the interest payment dates or the maturity date falls on a day that is not a Business Day, the payment of interest or principal will be postponed to the next succeeding Business Day, but the payment made on such dates will be treated as being made on the date payment was first due and the holders of the Bonds will not be entitled to any further interest or other payments with respect to such postponements.

          Reference is hereby made to the further provisions of this Bond set forth on the reverse hereof which further provisions shall for all purposes have the same effect as if set forth at this place.

          Unless the certificate of authentication hereon has been executed by or on behalf of U.S. Bank National Association, as Trustee under the Indenture, or its successor thereunder, by manual signature, this Bond shall not be entitled to any benefit under such Indenture, or be valid or obligatory for any purpose.

          IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its corporate seal.

(Seal)

Attest:

Trustee’s Certificate of Authentication

This is one of the Bonds of the series designated therein, described in the within-mentioned Indenture

Dated:

By: U.S. BANK NATIONAL ASSOCIATION, Trustee

REVERSE OF BOND

          This Bond is one of an authorized issue of Bonds of the Company known as its “3.875% Collateral Trust Bonds due 2015”, issued and to be issued in one or more series under, and all equally and ratably secured (except as any sinking or other fund may afford additional special security for the Bonds of any particular series) by, an Indenture dated as of October 25, 2007 (as amended, supplemented and modified and in effect from time to time, the “Indenture”), executed by the Company to U.S. Bank National Association, as Trustee (herein called the “Trustee”, which term includes any successor Trustee under the Indenture), to which Indenture reference is hereby made for a description of the nature and extent of the securities and other property assigned, pledged, transferred and mortgaged thereunder the rights of the Holders of said Bonds and of the Trustee and of the Company in respect of such security, and the terms upon which said Bonds are to be authenticated and delivered.

          The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Bonds under the Indenture at any time by the Company with the consent of the Holders of not less than a majority in aggregate principal amount of the Bonds at the time Outstanding as defined in the Indenture. The Indenture also permits, without the consent of the holders of any Bonds, the parties to any Mortgage Notes pledged under the Indenture, and any Mortgages or Loan Agreements pursuant to which they were issued, to modify, alter, supplement or a