The pocketed freetail bat is apparently rare in collections. Shamel (Proc. U. S. Nat. Mus., 78: 13, 1931), when he made a survey of the American members of the genus Tadarida, had only nine specimens available from seven localities in the United States and Mexico. These were: Arizona—Fort Huachuca, 1; Coyote Mountains, 1. California— Agua Caliente, 1; mouth of Colorado River, 1 (=Baja California, see Neil, Jour. Mamm., 21: 356, 1940). Baja California—Santa Anita, 1; San Pedro Mountains, 1. Jalisco—Zacoalco, 3. Since Shamel's report the pocketed freetail bat has been reported from four additional localities, two in Mexico and two in southern California. Benson (Jour. Mamm., 21: 26–29, 1940) reported a series of 11 specimens (six males, five females) taken by him the night of April 24, 1939, from a pool of water 1 mi. NW Alamos, Sonora. These bats were captured by stretching...