Descriptions of East Asiatic Mammals 81 
la; Hesperoptenus, Tickell's Bats ; Tylonycteris, the Flat-headed 
Bats; Barbastella, the Barbastelles ; the group Vespertilionini, 
containing Vespertilio, the Frosted or Linngeus's Bats; Eptesi- 
cus, the Big Brown Bats and Serotine Bats; and the group 
Nycticeini, including Scotophilus, the Yellow Bats, and Scoto- 
manes, the Harlequin Bats. 
The majority of these Bats are colored some shade of brown : 
light ashy brown, as in many Mouse-ears, Pipistrelles, and 
Serotines; red-brown, as in other Mouse-ears, Noctules, and 
Scotophiles; or blackish brown, as in still other Mouse-ears, 
Pipistrelles, la, and the Barbastelle. In Vespertilio and Pipis- 
trellus affinis the tips of the brown hairs are frosted; and in 
P. circumdatus the dark brown hairs are tipped with bronze. 
Outstandingly conspicuous on account of their color patterns 
are those Bats of the genus Myotis that are distinguished as the 
subgenus Chrysopteron (meaning "copper-winged"), and Sco- 
tomanes ornatus. In Chrysopteron the wings are patterned in 
two colors, red and dark gray. In Scotomanes ornatus the color 
is composed of richly varying shades of brown, but the out- 
standing features are a pure white patch on the forehead, a 
narrow stripe of white on the middle of the back, and on either 
side a white mark just where the wings join the body. 
The Mouse-eared Bats, genus Myotis, according to the 
authority of Miller, include some eighty species. The genus is 
distributed almost throughout the continents of the world, and 
is absent only from the polar regions, from very high moun- 
tains, and from the southern parts of Australia. 
The best way to distinguish Myotis from other genera, when 
in captivity, is to examine and count the teeth. If 3 upper and 3 
lower premolars (the middle one of each lower set of three 
extremely small) are present, you have Myotis. No other living 
Vespertilionine genus except Plecotus has as many premolars. 
With the exception of the subgenus Chrysopteron (see above), 
Myotis are colored grayish, brownish, reddish, or nearly black. 
