=Lasiurus borealis borealis= (Müller) 1776. _Vespertilio borealis_ Müller, Des Ritters Carl von Linné ... vollständiges Natursystem ..., Suppl., p. 20, type from New York. 1897. _Lasiurus borealis_, Miller, N. Amer. Fauna, 13:105, October 16. _Distribution in Tamaulipas._--Known only by two specimens from Matamoros (Miller, 1897:108). =Lasiurus borealis teliotis= (H. Allen) 1891. _Atalapha teliotis_ H. Allen, Proc. Amer. Philos. Soc., 29:5, April 10, type from an unknown locality, probably some part of California. 1897. _Lasiurus borealis teliotis_, Miller, N. Amer. Fauna, 13:110, October 16. _Distribution in Tamaulipas._--Generally distributed in higher parts of state. Eight June-taken females, all lactating, from the Sierra de Tamaulipas averaged 10.0 (8-12) grams; five males from there weighed 9.2 (8-10) grams. According to Hall and Kelson (1959:188), males of this species usually are more brightly colored than females but this phenomenon is not evident in the Tamaulipan specimens. Males do, however, average slightly smaller than females. The name _Lasiurus borealis teliotis_ is employed following Handley (1960:472); formerly _L. b. ornatus_ Hall was applied (Hall and Kelson, 1959:190) to bats here referred to as _teliotis_. _Records of occurrence._--Specimens examined, 7: Cd. Victoria, 1800 ft., 1; Sierra de Tamaulipas, 2 mi. S, 10 mi. W Piedra, 1200 ft., 1; Sierra de Tamaulipas, 3 mi. S, 14 mi. W Piedra, 1200 ft., 1; Sierra de Tamaulipas, 3 mi. S, 16 mi. W Piedra, 1400 ft., 4. =Lasiurus cinereus cinereus= (Palisot de Beauvois) Hoary Bat 1776. _Vespertilio cinereus_ (misspelled _linereus_) Palisot de Beauvois, Catalogue raisonné du muséum de Mr. C. W. Peale, Philadelphia, p. 18, type from Philadelphia, Pennsylvania. 1864. _Lasiurus cinereus_ H. Allen, Smiths. Misc. Coll., 7 (publ. 165): 21, June. _Distribution in Tamaulipas._--Probably state-wide but so far reported only from Matamoros (Miller, 1897:114), and Aserradero del Infernillo (Goodwin, 1954:6--cranium only). =Lasiurus intermedius intermedius= H. Allen Northern Yellow Bat 1862. _Lasiurus intermedius_ H. Allen, Proc. Acad. Nat. Sci. Philadelphia, 14:246, "April" (between May 27 and August 1), type from Matamoros, Tamaulipas. _Distribution in Tamaulipas._--Eastern half of state, known only from three localities. The three specimens examined were taken in mist nets along with _Lasiurus ega_, _Pteronotus rubiginosus_ and _Mormoops megalophylla_. The generic name _Lasiurus_ is used instead of _Dasypterus_ following Hall and Jones (1961). _Records of occurrence._--Specimens examined, 3: Sierra de Tamaulipas, 2 mi. S, 10 mi. W Piedra, 1200 ft., 1; Sierra de Tamaulipas, 3 mi. S, 16 mi. W Piedra, 1400 ft., 2. Additional record: Matamoros (H. Allen, 1862:246).