1844. _Choeronycteris mexicana_ Tschudi, Untersuchungen über die fauna Peruana ..., p. 72, type from México. _Distribution in Tamaulipas._--East side of Sierra Madre in southwestern part of state. Specimens from La Mula were obtained in a small cave, which was inhabited also by _Desmodus rotundus_ and _Tadarida brasiliensis_. The specimens from Miquihuana were captured in a mine by a native. Those from four kilometers north of Joya Verde also were taken from a mine. Females obtained in August at La Mula were lactating. Specimens examined are indistinguishable from _C. mexicana_ from Oaxaca and Jalisco. Baker (1956:172) found no differences between Coahuilan and Tamaulipan specimens. Most Tamaulipan specimens are dark grayish, but some are brownish and some are intermediate between the two colors mentioned. Fourteen adults weighed an average of 16.0 (12-18) grams. _Records of occurrence._--Specimens examined, 19: 4 km. N Joya Verde, 4000 ft., 3; La Mula, 13 mi. N Jaumave, 4; Cueva La Mula, 10 km. W Joya Verde, 2400 ft., 2; Miquihuana, 6500 ft., 10. =Mormoops megalophylla megalophylla= (Peters) Peters' Leaf-chinned Bat 1864. _Mormops megalophylla_ Peters, Monatsb. preuss. Akad. Wiss., Berlin, p. 381, type from southern México. _Distribution in Tamaulipas._--Throughout state, except possibly west of the Sierra Madre Oriental. Specimens from the Sierra de Tamaulipas were taken in mist nets in which _Pteronotus rubiginosus_, _Lasiurus borealis_, or _Centurio senex_ also were captured. The specimen from Rancho Santa Rosa was shot as it flew at a height of six feet. Tamaulipan specimens of _Mormoops megalophylla_ are here assigned to _M. m. megalophylla_ instead of to _M. m. senicula_ following Villa and Jimenez (1961:503), who regarded _senicula_ as indistinguishable from _megalophylla_. Weight of four specimens from the Sierra de Tamaulipas averaged 16.2 (15-18) grams. _Records of occurrence._--Specimens examined, 5: Sierra de Tamaulipas, 3 mi. S, 16 mi. W Piedra, 1300 ft., 2; Sierra de Tamaulipas, 3 mi. S, 14 mi. W Piedra, 1400 ft., 1; Sierra de Tamaulipas, 3 mi. S, 10 mi. W Piedra, 1400 ft., 1; Rancho Santa Rosa, 25 km. N, 13 km. W Cd. Victoria, 260 m., 1. Additional records: Cueva de Los Troncones, 7.5 km. NNW, 3.5 km. S Cd. Victoria (Villa and Jimenez, 1961:503); Cueva de Quintero, 15 km. SSW Cd. Mante (_ibid._); Tampico (Davis and Carter, 1962:67). =Micronycteris megalotis mexicana= Miller Brazilian Small-eared Bat 1898. _Micronycteris megalotis mexicana_ Miller, Proc. Acad. Nat. Sci. Philadelphia, 50:329, August 2, type from Platanar, Jalisco. _Distribution in Tamaulipas._--Known only from Rancho Pano Ayuctle (Goodwin, 1954:4). The single specimen of this species presently known from Tamaulipas was shot while it was roosting in a ranch house. =Glossophaga soricina leachii= (Gray)