276 University of California Publications in Zoology [Vou.17 
Specimens Examined.—But a single example of the Yuma bat from 
California has been examined by the writer: Carroll Creek, Inyo 
County, 1. 
Natural History—The writer has found nothing published upon 
the habits of the Yuma bat. 
Myotis yumanensis sociabilis H. W. Grinnell 
Tejon Bat 
Myotis yumanensis, Miller (1897b, pp. 66-68), part. Description; dis- 
tribution. 
Myotis yumanensis, Elliot (1901, p. 403), part. Diagnosis; distribution. 
Myotis yumanensis, Elliot (1904a, pp. 318-319), part. Occurrence at Fort 
Tejon. 
Myotis yumanensis, Elliot (1904b, pp. 576-577), part. Diagnosis; dis- 
tribution. 
Myotis yumanensis, Elliot (1905, p. 475), part. Diagnosis; distribution. 
Myotis yumanensis, Stephens (1906, p. 267), part. Diagnosis; distri- 
bution. 
Myotis yumanensis, Elliot (1907, pp. 501-502), part. Localities of cap- 
ture in California. 
Myotis lucifugus longicrus, J. Grinnell (1908, p. 158), part. San Bernar- 
dino Mountains. 
Myotis yumanensis yumanensis, Miller (1912, p. 56), part. General range. 
Myotis yumanensis yumanensis, J. Grinnell (1913b, pp. 276-277), part. 
Range in California. 
Myotis yumanensis yumanensis, Grinnell and Swarth (1913, pp. 380-381). 
Record of capture in the San Jacinto Mountains. 
Myotis ywmanensis sociabilis H. W. Grinnell (1914, pp. 318-319). Orig- 
inal description; type locality, Fort Tejon, Kern County, California. 
Diagnosis—Similar in general characters to Myotis yumanensis 
yunanensis (H. Allen) and M. y. saturatus Miller, but intermediate 
in color between these two forms. 
Description—F ur distributed as in M. y. yumanensis; on middle 
of back averages about six millimeters in length. Hairs everywhere 
clove brown at bases; distal half of fur on dorsal surface wood 
brown; fur below light buff, with darker bases of hairs showing 
through. On throat, sides and chin the color varies toward warm 
buff; ears olive brown; feet, wings and tail-membranes clove brown. 
The young are darker and grayer throughout, entirely lacking the 
buffy tint of the adults. Specimens of M. y. sociabilis from the San 
Bernardino Mountains show strong superficial resemblance to the 
smaller individuals among a series of Myotis longicrus interior Miller 
from the same locality. The longer tibia of the latter species, how- 
ever, together with the slightly greater size of skull and the more 
elevated occipital region, serves to allocate individuals. 
Measurements——A series of five adult males of M. y. sociabilis 
averages in millimeters as follows: Total length, 81.4 (extremes 
