﻿MYOTIS LUCIFUGUS. 



59 



Specimens examined. — Total number 46, from the following, localities : 



Arizona: San Bernardino Ranch (Monument 77, Mex. Bound. Line), 5 (skins). 

 Hidalgo: Tulancingo, 4 (1 skin). 

 Indian Territory : Fort Reno, 3. 



Jalisco: Guadalajara, 2 (skins, Merriam Coll.) ; Santa Cruz del Valle, 3 (skins, 

 Am. Mus. Nat. Hist.) ; Hacienda San Marcos, Tonila, 1 (skin. Am. Mus. 

 Nat. Hist.). 



Mexico: Lernia, 1; Ixtapalapa, 1; City of Mexico, 1 (skin). 

 Miclioacan: Patzcuaro, 11 (3 skins). 

 Missouri: Marble Cave, Stone County, 3. 

 San Luis Potosi: Ahualulco, 1. 



Texas: Mouth of Pecos River, 4; New Braunfels, 1; San Antonio, 4 (skins, 



Am. Mus. Nat. Hist., including type of ' incautus'). 

 Vera Cruz: Las Vigas, 1. 



General remarlcs. — Tlirougli tlie kindness of Dr. J. A. Allen, I have 

 been able to examine two of the original specimens of Myotis velifer 

 from Santa Cruz del Yalle, Guadalajara, Jalisco, and four specimens 

 (including the type) of ' Vespertilio incautus^ from San Antonio, Texas. 

 After comparing the specimens of Hncautus^ with seven M. velifer 

 from various parts of Mexico, I can find no characters to separate the 

 two even subspecifically. In size as well as in cranial and dental 

 characters they agree x^erfectly, while the difference in color is too 

 slight to be described by words. As the specimens from Mexico were 

 all taken in midsummer and those from Texas were killed in October 

 the variation in color is probably seasonal. 



The large size of this bat distinguishes it at a glance from all other 

 Mexican or United States species except AI. thysanodcs. From the latter 

 the darker color, slender calcar, naked free border of interfemoral mem- 

 brane, and shorter ears and tragus separate it without difficulty. 



Myotis velifer^ while totally different from all other bats found in 

 Mexico or the United States, is doubtfully distinct from the South 

 American i¥. albescens. Mr. Oldfield Thomas, who has compared for 

 me specimens of the former with the albescens in the British Museum 

 so named by Dobson after examination of the type, writes that M. vel- 

 ifer and albescens are practically identical. It is best, however, to 

 retain the name velifer for the bat occurring in Mexico and the United 

 States until the South American species has been positively identified. 



Dr. Harrison Allen refers to this bat in his recent monograph as 

 Ves2)ertilio albescens velifer. Under the same name he mentions a 

 specimen of 71/. thysanodes from 'Dalyura' (=Dulzura), Oal. ; while the 

 Texan specimens of velifer in the Biological Survey collection he has 

 labeled ' T". albescens V 



MYOTIS LUCIFUGUS (Le Conte). Little Brown Bat. 



1831. FespcrtiUo lucifngus LeConte, McMurtrie's Cuvier, Animal Kingdom, I, Append., 



p. 431. (Southern Georgia.) 

 1856. VespertUio f9ul)ulatus Le Conte, Proc. Acad. Nat. Sci. Phila. (1854-55), p. 435. 

 1864. Vespertilio affinis H. Allen, Monogr. N. Am. Bats, p. 53. 

 1864. Vespertilio lucifngus H. Allen, Monogr. N. Am. Bats, p. 55. 



