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.