76 



Order CHIROPTERA 



Length measurements: head and body about 1)4 inches (4-1 — 1-7 

 mm.) ; tail l]/i-\]/^ inches (29-39 mm.) ; over-all about 2J/6- 

 3^8 inches (73-86 mm.) ; hind foot about Y% inch (8-11 mm.) : 

 ear from notch Y%-^4, inch (9-15 mm.). Weight: about a sixth 

 of an ounce (4.2 gm.). 



The skull is small, measuring 12.3-13.0 mm. (about }/> inch) 

 in length. Dental formula: I 2/3, C 1/1, Pm 2/2. M 3/3. 



Life History. — The eastern pipistrel spends the winter in 

 deep sleep, individuals hanging singly or in clusters of several in 

 the dark, damp chambers of caves. Because of the moisture in 

 the caves, droplets of water often cover the fur, and, when a 

 beam of light is played on the bats, the fur appears to glitter like 

 a coat of pearls, fig. 54. 



Fig. 54. — Eastern pipistrel 



