63 STAT.] 81ST CONG. , 1ST SESS.--CH. 680-OCT. 12 , 1949 as amended (18 U. S . C . 391-394), and for the enforcement of section 1 of the Act approved May 25, 1900 (16 U. S . C . 701), including neces- sary investigations, $388,000, of which not to exceed $10,000 may be expended in the discretion of the Secretary for the purpose of securing information concerning violations of the laws for the enforcement of which this appropriation is made available. Alaska fisheries and game: For carrying out the provisions of the Acts of June 26, 1906, and June 6, 1924 (48 U. S . C. 221 -246), and Acts amendatory thereof and supplementary thereto, relating to fish- eries, and the Act of July 1, 1943 (48 U. S. C . 192-211), as amended, relating to game, including the construction, improvement, repair, and alteration of buildings, roads, and other facilities, and contract sten- ographic reporting services, $1,250,000, of which not to exceed $10,000 may be expended in the discretion of the Secretary for the purpose of securing information in connection with and for the prosecution of violators of the laws for the enforcement of which this appropriation is made available. Maintenance of mammal and bird reservations: For the administra- tion, protection, and maintenance of mammal and bird reservations and the maintenance and protection of game introduced into suitable localities on public lands, under supervision of the Fish and Wildlife Service, including construction of fencing, wardens' quarters, shelters for animals, landings, roads, trails, bridges, ditches, telephone lines, rockwork, bulkheads, repair of damage to public roads within reser- vation areas occasioned by authorized operations of the Fish and Wild- life Service, and other improvements necessary for economical administration; for the purchase, capture, and transportation of game for national reservations; for the maintenance of the herd of long- horned cattle on the Wichita Mountains Wildlife Refuge; and for carrying out the provisions of the Act approved August 5, 1947 (Public Law 361, Eightieth Congress), $1,755,500, and in addition thereto an amount equal to 75 per centum of the net proceeds received during the next preceding fiscal year under the provisions of section 401 of the Act of June 15, 1935 (16 U. S . C. 715S), which additional amount may be expended also for the enforcement of the Migratory Bird Treaty Act of July 3, 1918, as amended. River basin studies: For investigations and studies to determine the effects on fish and wildlife resources of proposed developments of river basins of the United States (except the Missouri River Basin), and for the preparation of reports thereon in accordance with the Act of March 10, 1934 (16 U. S. C. 661-666), as amended, $175,000. California wildlife management areas: For the purchase or rent, and development, maintenance, and administration of wildlife man- agement areas in the State of California, as authorized by the Act of May 18, 1948 (Public Law 534), $250,000, to remain available until expended. The foregoing amounts for the Fish and Wildlife Service shall be available in one fund. MIGRATORY BIRD CONSERVATION rFND For carrying into effect section 4 of the Act of March 16, 1934, as amended (16 U. S . C. 718-718h), an amount equal to the sum received during the current fiscal year from the proceeds from the sale of stamps, to be warranted monthly and to remain available until expended. FEDERAL AID IT WIrDWIFE RESTORATION For carrying out the provisions of the Act of September 2, 1937, as amended (16 U. S . C. 669-669j), an amount equal to the sum credited during the next preceding fiscal year to the special fund created by said Act: Provided. That not exceeding 35 per centum of the amount 797 35 Stat. 1137. 18 U. S. 0., Supp. II, §§42-44 and notes. Ante, p. 89. 31 Stat. 187. Securing informa- tion of law violations. 34 Stat. 478; 43 Stat. 464. 57 Stat. 304. 48 U. S. C., Supp. II, § 210. Ante, p. 56. 61 Stat. 770. 49 Stat. 383 . 16U. S.C. §71s. 48 Stat. 401 . 16 U. 8. C., Supp. II, 661 note. 62 Stat. 238. 16 U. S. C., Supp. II, I 695-69c. 48 Stat. 461. 16 U. S. C. ns8d. Ante, p. 600. 50 Stat. 917. Limitation.