82 
Mammals of Eastern Asia 
The hind foot in two of the subgenera, leuconoe and Rickettia, 
is proportionately much enlarged, its length 60 to 65 per cent or 
more of the length of the shin bone, while in the remaining 
subgenera it measures only about 50 per cent of that length. 
Metacarpal 
Digit II 
Interfemoral 
Membrane 
Tail 
Digit III 
Fig. 10. Mouse-eared Bat, Myotis, illustrating the parts of the wing 
and tail in most kinds of Bats. 
The snout is long, in order to accommodate the larger number 
of teeth. The various species spend the day in caves, hollow 
trees, or empty dwellings. 
Seven subgenera have recently been recognized, six of which 
occur in our area. As is the case with many other large genera, 
a few of the groups contain most of the species. The subgenera 
with their more important species are shown next : 
The Whiskered Bats, subgenus Selysins, contain many 
species and races, including the European Whiskered Bat, 
