366 University of California Publications in Zoology (Vou. 17 
of the state it is one of the most abundant bats, occurring in great 
colonies where conditions are favorable. (See map, text-fig. X.) 
Specimens Examined.—The writer has examined 217 specimens 
of Nyctinomus mexicanus from the following localities in California: 
@ NYCTINOMUS MEXICANUS 
DISTRIBUTION MAP 
MUSEUM OF VERTEBRATE ZOOLOGY 
! UNIVERSITY OP CALIFORNIA 
Fig. X. Map showing stations of occurrence in California of Nyctinomus 
mezxicanus, as established by specimens examined by the author. 
San Diego County: Sweetwater Dam, 1; Imperial County: 8 miles 
east of Picacho, 1; Echo Island, Salton Sea, 1; Riverside County: 
Mecea, 1; San Jacinto, 10 (Stanford Univ.) ; San Bernardino County: 
Chemehuevis Valley, 1; San Bernardino, 2; Los Angeles County: 
Glendora, 1; Pasadena, 11; San Francisquito Canon, 1; Santa Moniea, 
