28 BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



specimens of the eastern animal and of those species actually known 

 to occur in Colorado at hand for comparison, is immediately seen to 

 apply much less to the former than to a definite one of the latter, 

 namely, the bat on which Merriam based the name ciliolahrum in 

 1886. 



Tenuidorsalis {Vespertilio) H. Allen, Proc. Acad. Nat. Sci. Phila- 

 delphia, p. 283, 1866. An examination of the type (from Cape St. 

 Lucas, Lower California) shows that the specimen on which this name 

 was based, is identical with Myotis calif ornicus. 



Thomasi {Myotis) Cabrera, Bol. Soc. Espan. Hist, Nat., Madrid, 

 vol. 1, p. 370, 1901. The structural characters ascribed to this bat 

 convince us that the name applies to the subspecies of M. chilo'ensis 

 occurring in the Andean region from northern Ecuador to Bolivia 

 which Peters had previously called Vespertilio oxyotus. 



Thysanodes {Myotis) Miller, North Amer. Fauna, No. 13, p. 80, 

 October 16, 1897. This is the tenable name for the large Myotis with 

 long ears and well-fringed interfemoral membrane occurring in the 

 western United States and Mexico. The type locality is Old Fort 

 Tejon, Calif. 



Velifer {Vespertilio) J. A. Allen, Bull. Amer. Mus. Nat. Hist., vol. 3, 

 p. 177, December 10, 1890. This is the name of the large drab-gray 

 Myotis with large foot, common in the southwestern United States 

 and through Mexico to Guatemala. The type locality is Guadala- 

 jara, Jalisco, Mexico. 



Virginianus {Vespertilio) Audubon and Bachman, Journ. Acad. 

 Nat. Sci. Philadelphia, ser. 1, vol. 1, p. 93, 1841. This is undoubtedly 

 a synonym of Myotis luci-fugus. The original description and 

 measurements apply fairly well to that species and the characteristic 

 dark shoulder spot is especially mentioned. The specimen came from 

 the " mountains of Virginia," where M. lucifugus is common. 



Volans {Vespertilio) H. Allen, Proc. Acad. Nat. Sci. Philadelphia, 

 p. 282, 1866. The correct disposition of this name remained for nearly 

 fifty years unsettled. It was originally applied to a bat from Cape 

 St. Lucas, Lower California, but the description was quite inade- 

 quate, and its author subsequently considered it a synonym of his 

 Vespertilio nitldus. Miller later placed both names in the synonymy 

 of Myotis califomicus; but the rediscovery of the type and its ex- 

 amination by Goldman in 1914 proved volans to be the first name 

 applicable to the short-eared, long-legged Myotis of western North 

 America, then currently known as M. longicrus. The name Myotis 

 vol-ans is therefore tenable in a specific sense, while longicrus remains 

 available for the dark race of the humid northwest coast. 



Winnemana {Myotis) Nelson, Proc. Biol. Soc. Washington, vol. 26, 

 p. 183, August 8, 1913. This name was given to the small-footed, 



