1955. _Myotis evotis auriculus_ Baker and Stains, Univ.
Kansas Publ., Mus. Nat. Hist., 9:83, December 10, type from
10 m. W, 2 mi. S Piedra, 1200 ft., Sierra de Tamaulipas,
Tamaulipas.
1960. _Myotis keenii auriculus_, Findley, Jour. Mamm.,
41:18, February.
_Distribution in Tamaulipas._--Known only from type locality
(2 specimens), but probably widely distributed in western
part of state.
The two specimens known from Tamaulipas were caught in a mist net
stretched across a narrow, brush-bordered arroyo in the Sierra de
Tamaulipas. I tentatively follow Findley (1960) in arranging
_auriculus_ as a subspecies of _M. keenii_.
_Records of occurrence._--Specimens examined, the holotype
and one topotype.
=Myotis californicus mexicanus= (Saussure)