Nycticeius humeralis mexicanus Davis
1944. Nycticeius humeralis mexicanus Davis, Jour. Mamm., 25:380, December 12, type from Río Ramos, 1000 ft., 20 km. NW Montemorelos, Nuevo León.
Distribution in Tamaulipas.—Known certainly only from central part, but probably occurs at suitable places in all but extreme northern Tamaulipas.
Twenty-seven of 37 adults of N. humeralis examined from Tamaulipas are pale as is N. h. mexicanus, but 10 are darker and approach N. h. humeralis in this respect. Twenty-two females averaged 10.3 (9-13) grams and eight males averaged 9.5 (8-11) grams in weight.
Records of occurrence.—Specimens examined, 45: Cd. Victoria, 10; Sierra de Tamaulipas, 2-3 mi. S, 10 mi. W Piedra, 1200 ft., 31; 3 mi. S, 16 mi. W Piedra, 1400 ft., 4.
Rhogeëssa tumida tumida H. Allen
Little Yellow Bat
1866. R[hogeëssa]. tumida H. Allen, Proc. Acad. Nat. Sci. Philadelphia, 18:286, type from Mirador, Veracruz.
Distribution in Tamaulipas.—Southeastern part of state.
Specimens obtained from the vicinity of La Pesca were shot as were some from the Sierra de Tamaulipas. Others from the Sierra de Tamaulipas were taken in mist nets that were stretched across a small pool in an arroyo; Eptesicus fuscus, Myotis velifer, M. keenii and Nycticeus humeralis were captured in the same nets.