MAMMALS OF MARYLANiD 



57 



Figure 22. — Distribution of Lasiurus cinereus cinereusf^ 



Distribution in Maryland. — Occurs as a migrant in all sections of the 

 State ; may breed in the higher portions of the Allegheny Momitain 

 section. 



Distinguishing characteristics. — Teeth as in L. horealis; size large 

 (averaging 135 mm in total length) ; wingspread averaging around 14 

 inches; coloration a mixture of grayish umber and chocolate brown, 

 heavily tinged with white, so as to produce a hoary effect, especially on 

 the back; head blunt, with ears large and rounded, conspicuously 

 rimmed with black or dark brown ; tail medium length, about 40 per- 

 cent of total length of the animal; interfemoral membrane thickly 

 furred on upper surface nearly to the edge; anterior edge of under- 

 side of wing furred for about half its length. This bat is easily dis- 

 tinguished from all other Maryland bats by its large size and unique 

 coloration. 



Measurements. — ^Measurements of an adult male from Washington, 

 D.C., are as follows : Total length 135.5 ; tail 61.5 ; hind foot 13 ; great- 

 est length of skull 16.1 ; zygomatic breadth 12.0 ; interorbital breadth 

 4.9 ; length of maxillary toothrow 6.2. 



An adult female from Washington, D.C., has the following cranial 

 measurements : Greatest length of skull 16.9 ; zygomatic breadth 12.7 ; 

 interorbital breadth 5.5 ; length of maxillary toothrow 6.2. 



Habitat and habits. — This is a migratory species. It breeds and 

 spends the summer in the northern part of its range, from southeast- 



