272 CALIFORNIA MAMMALS. 



Lasiurus cinereus Beauvois. (Ashy.) 



HOARY BAT. 



Large ; ears mostly furred on both sides ; a spot of fur on the 

 upper side of wing near elbow and one or two at wrist ; a strip of 

 fur on the under side from elbow to wrist; upper side of inter- 

 femoral membrance thickly furred ; under side bare except near 

 body ; upper pelage blackish at base, the middle of the hairs pale 

 yellowish brown becoming umber brown on the interfemoral mem- 

 brane, tips distinctly hoary white with a narrow chocolate sub- 

 terminal zone; head mostly ochraceous; breast and much of the 

 belly similar to the back; remainder of lower parts, including 

 throat, grayish buff. 



Length about 135 mm. (5.30 inches) ; tail vertebrcT 57 

 (2.25) ; ear from crown 13 ( .50) ; expanse of wings 400- ( 16). 



Type locality, Philadelphia, Pennsylvania. 



Hoary Bats are found in most parts of North x\merica. In 

 summer they mostly frequent mountains or cool hilly regions. 

 Several have been found hanging in the thick foliage of orange 

 trees in southern California in winter. I found them in May in 

 the redwoods of Mendocino County. Their flight is swift, with 

 frequent abrupt turns. They do not appear until the light be- 

 comes very dim. 



