Bats 
273 
b". Ear and tragus short and broad, the latter 0.31 or less 
in length; color brown, darkest of the Colorado 
species. M. 1. longicrus, p. 273 
B. Ear when laid forward extending 0.25 to 0.4 beyond nostril; 
color light yellowish brown. M. evotis, p. 276 
Myotis lucifugus longicrus (Lat. lucifugus, shunning light 
or daylight; longus, long + cms, the lower 
leg). Little Brown Bat. 
Vespertilio longicrus True, Science, viii., p. 588 (1886). 
Type locality. — Puget Sound. 
Measurements. — Total length, 3.9; tail vert., 1.75; hind foot, 
0.31; forearm, 1.5; length of skull, 0.55; width, 0.35. 
Description. — (From a specimen taken at Twining, New Mexico, 
Aug. ist): Above dark brown; under parts paler, with grayish 
cast; base of hair above and below blackish; ears and membranes 
look blackish, though brown by transmitted light. 
The skull is characterized by broad muzzle and palate and gradu- 
ally sloping forehead; the brain-case is broad and inflated at the 
back, less so in front. The skull differs from that of AI. subulatus 
in its slightly smaller size, broader palate and muzzle, and less 
abruptly elevated face line (Miller). This is the largest species 
of Myotis found in Colorado. 
Distribution. — Miller, I. c, gives the distribution of this bat as 
being in the Boreal and Transition zones from Puget Sound east 
to Wyoming; south at least to Arizona and southern California. 
Miller records it from Grand Junction, and I have taken it near 
Herard P. O., Saguache County, 8,700 feet, and also have a bat 
from Medano Ranch, Costilla County, which resembles longicrus 
but differs in some respects and is as yet unidentified. 
Myotis yumanensis (named for the type locality). Fort 
Yuma Bat. 
Vespertilio yumanensis H. Allen, Monogr: N . Am. Bats, p. 58 
(1864). 
Type locality. — Old Fort Yuma, California. 
Measurements. — Total length, 3.15; tail vert., 1.14; hind foot, 
0.35; forearm, 1.3. Length of skull, 0.50; width, 0.33. 
Description. — (From a specimen taken at Del Rio, Texas, May 26, 
1903): Above a very pale yellowish brown; below grayish white. 
Membranes and ears pale brown. 
Skull is like that of M. I. longicrus in form, but is smaller, and 
has shorter broader palate. It can be distinguished from that 
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