284 THE QUADRUPEDS OF ARIZONA. 
tirely different family. This Bat is, as its name indicates, 
much lighter and paler in color than most of our other 
species; and it has also a peculiar physiognomy, more 
repulsive and forbidding than is usual even in this family, 
none of whose members have remarkably prepossessing 
features. Its naked muzzle has a peculiar livid hue in 
ife. The species is very abundant at Fort Yuma, where, 
during the hot months, it becomes a decided nuisance. 
Numbers take up their abode in the chinks and crannies 
of the officers’ quarters; and the proximity of these re- 
treats actually becomes offensive from the multitudes 
crowded together. During the daytime a continual 
scratching and squeaking, as of so many mice, is heard 
in their retreats, and at night they are even more annoy- 
ing, by fluttering in scores about the rooms. They are 
accused of harboring about their bodies quantities of those 
nocturnal pests, the bed-bugs; but whether justly or not 
I cannot say. When caught or disabled, they have a 
harsh squeak ; and if incautiously handled, bite with vigor 
and considerable effect. 
The well-known little Brown Bat ( V. subulatus Say) 
is generally and abundantly distributed throughout the 
Territory. 
In the Colorado Desert, near Fort Mojave, I procured ` 
-a small Bat, much like the preceding species ; but which 
my friend Dr. Allen, who kindly examined it, considers 
as probably a new species, and has named Vespertilio 
macropus.* It chiefly differs from Vespertilio subulatus in 
the degree of the attachment of the wing membrane to the 
foot. When shot, it was industriously capturing insects 
-over a small pool, in broad daylight. 
a it, 1800. Proceedings of the Academy of Natural Sciences, Philadelphia, for 
