78 
Mammals of Eastern Asia 
by ridges that tend to form a pattern like the letter W. Some 
of the South American Glossophaginae have the molars reduced 
to compressed, nearly patternless structures somewhat like those 
seen in most Megachiroptera. 
Many members of the Microchiroptera are found in the tem- 
perate climates of the globe as well as in the tropics, while the 
Megachiroptera must be regarded as nearly confined to the 
tropics and subtropics. Some Microchiroptera hibernate in cav- 
erns during the northern winters ; others migrate. The number 
of young produced is usually one, sometimes two ; but the North 
American Red Bats, in which there are two pairs of nipples 
instead of the usual one pair, may have four young. 
It has been indicated that among Bats the "Micros" include a 
large number of families, while the "Megas," the Fruit Bats, 
comprise but one. Such being the case, a correspondingly wider 
range of form and behavior is naturally to be encountered in 
Number 
Number 
Families 
Subfamilies 
of 
Genera 
of 
Species 
Distribution 
Vespertilionidae 
Vespertilioninae* 
Many 
Very many 
World-wide tropics 
to temperate 
Kerivoulinae 
3 
Few 
Old World tropics 
Murininae 
3 
Few 
Oriental tropics and 
subtropics 
Miniopterinse 
1 
Few 
Old World tropics 
Molossidse 
Several 
Numerous 
World-wide tropics 
and subtropics 
Rhinopomidae 
1 
Few 
Sumatra and Africa 
only 
Emballonuridse 
2 
Numerous 
Indo-Australia and 
Africa 
Megadermidae 
2 
Few 
Indo-Australia and 
Africa 
Rhinolophidae 
Rhinolophinae* 
1 
Many 
Old World tropics 
and subtropics 
Hipposiderinae* 
Several 
Many 
Old World tropics 
Coelopsinse 
1 
Few 
Oriental tropics 
* Contain most of the species of Asiatic Bats. 
