_Records of occurrence._--Specimens examined, 92: 9-1/2 mi. SW Padilla, 800 ft., 3; Rancho Santa Rosa, 25 km. N, 13 km. W Cd. Victoria, 260 m., 8; 3 mi. NE Guemes, 1; Sierra de Tamaulipas, 10 mi. W, 2 mi. S Piedra, 1200 ft., 3; Ejido Santa Isabel, 2 km. W Pan-American Highway, 2000 ft., 20; 70 km. (by highway) S Cd. Victoria and 6 mi. W Pan-American Highway, 43; 2 km. W El Carrizo, 12; 8 km. W, 10 km. N El Encino, 400 ft., 2. Additional records: Victoria (Nelson, 1898:147); Santa María (Goodwin, 1954:8); Rancho Viejo (_ibid._); Rancho del Cielo (_ibid._); 3 mi. NW Acuña (Hooper, 1953:4); Pano Ayuctle (_ibid._); Gómez Farías (Goodwin, 1954:8); Mesa de Llera, 10 mi. NE Zamorina (Hooper, 1953:4); Altamira (Nelson, 1898:147). =Sciurus alleni= Nelson Allen's Squirrel 1898. _Sciurus alleni_ Nelson, Proc. Biol. Soc. Washington, 12:147, June 3, type from Monterrey, Nuevo León. _Distribution in Tamaulipas._--Along Sierra Madre Oriental in southwestern part of state. This squirrel occurs in stands of oak and "nogalillos" (hickory) trees that grow along streams and arroyos. Individuals are active from sunrise to about 10:00 a. m. and again late in the afternoon. They give a soft "chirring" call. Nelson (1899:92) noted that specimens from Miquihuana were smaller than those from the type locality. Among specimens I have examined, some are as large as topotypes and two females are larger (total length, 486 and 490) than measurements given for the species by Nelson (_op. cit._). _Record of occurrence._--Specimens examined, 11, from Joya Verde, 35 km. SW Cd. Victoria, 3800 ft. Additional records: Near Victoria (Nelson, 1899:92); Miquihuana (_ibid._); Joya de Salas (Goodwin, 1954:8). =Glaucomys volans herreranus= Goldman Southern Flying Squirrel 1936. _Glaucomys volans herreranus_ Goldman, Jour. Washington Acad. Sci., 26:463, November 15, type from Mts. of Veracruz. _Distribution in Tamaulipas._--Known only from Aserradero del Infernillo (Goodwin, 1954:9 and 1961:9). =Geomys personatus personatus= True Texas Pocket Gopher 1889. _Geomys personatus_ True, Proc. U. S. Nat. Mus., 11:159 for 1888, January 5, type from Padre Island, Cameron County, Texas. _Distribution in Tamaulipas._--Known only from the barrier beach in northeastern part of state.