BROWN BAT 



membranes rather tough and leathery; tragus of medium 

 height, straight and moderately rounded at tip; pelage soft 

 and loose; flight membranes naked; interfemoral membrane 

 ample. 



Color. — Sexes colored alike; no marked seasonal variation. 



Upperparts uniform brown, varying slightly with in- 

 dividuals from sepia almost to cinnamon-brown; pelage 



Fig. 15. Head of Brown Bat 



blackish at base; membranes blackish; face and ears blackish; 

 underparts somewhat lighter than upperparts, a paler shade 

 of brown with buffy tinge. 



Measurements. — Total length, 4.5 inches; tail vertebrae, 

 1.6 inches; hind foot, .4 inch; forearm, 1.8 inches; wing ex- 

 panse, 12 inches. 



Geographical Distribution. — Most of North America. 



Food. — Flying insects. 



Enemies. — Owls. 



Species and Subspecies of the Genus Eptesicus 



Common Brown Bat; Big Brown Bat. — Eptesicus fuscus 



fuscus (Beauvois), Plate III. 

 As described above. Found in "Austral, Transition, and 

 lower edge of Boreal Zones throughout the greater part of 

 the United States and adjoining British Provinces." 

 (Miller) 



Eptesicus fuscus melanopterus Rehn 



Eptesicus fuscus hernardinus Rhoads 



These two races are listed in Miller's North American 



Recent Mammals, but are probably not to be distinguished 



from typical fuscus. 



59 



