MAMMALS OF MARYLAND 



59 



Figure 23. — Distribution of Nyctioeius humeraUs humeralis. 



Measurements, — ^Three adults from the vicinity of Washington, 

 D.C., have external measurements as follows: Total length 90, 95, 94; 

 tail 39, 35, 35 ; hind foot 10, 9, 8. Six adults from the vicinity of Wash- 

 ington have the following cranial measurements : Greatest length 14.2 

 (13.7-15.5) ; zygomatic breath 9.7 (9.6-10.0) ; interorbital breadth 3.9 

 (3.8^.0) ; maxillary toothrow 5.2 (5.0-5,4). 



Habitat and habits, — ^This is essentially a southern species that wan- 

 ders north in summer sometimes as far as Pennsylvania, Michigan, and 

 Illinois. It prefers to roost in hollow trees, flying out with a slow and 

 steady flight as darkness falls. It gives birth to two young, generally 

 in late May. Little else is known of its habits or life history. 



Specimens examined, — Montgomery County: Linden, 1; Plummers 

 Island, 1; Silver Spring, 1. Prince Georges County: Hyattsville, 2; 

 Oxon Hill, 1 ; near D.C. line, 1. District of Columbia: 6. 



(BIG-EARED BAT) 

 Plecotus townsendii virginianus (Handley) 



Corynorhynus virginianus Handley, Jour. Washington Acad. Sci., 45 

 (2) : 148, 23 May 1955. 

 Type looality. — Schoolhouse Cave, 4.4 miles NE of Riverton, 2,205 feet, Pendle- 

 ton County, W. Va. 



General distriJ)ution. — Central part of the Appalachian highlands in eastern 

 Kentucky, western Virginia, and eastern West Virginia. 



