VESPERTILIONID^ 271 



fornia and perhaps all the west coast region north of California 

 also. 



Genus Lasiurus Gray. (Hairy — tail.) 



Skull very short, broad, high; but one pair of upper incisors, 



divided by a wide space; first upper premolar minute, crn\^■ded out 



.on the tongLie side of the canine; upper side of the interfemoral 



membrane furred to the edge; ears broad, low, more or less 



furred; tragus rather short, curved; mammae four. 



Dental formula, I, i — 3 ; C, i — i ; P, 2 — 2 ; M, 3 — 3X2=32. 



Lasiurus borealis teliotis Allen. ( Northern; perfect- 

 ear. ) 



WESTERN RED BAT. 



Ears low, broad, the side toward the crown thickly furred, 

 the outer side with a few scattered hairs; tragus short, pointed, 

 wide, strongly curved ; wings furred next the body on both sides 

 and on the under side a thin strip of fur one fourth the width of 

 the wing extends to the wrist ; under side of interfemoral mem- 

 brane bare except near the base, upper 

 side middle half of hairs buffy or pale 

 yellowish, tips a reddish shade vaiying 

 from^ tawny or cinnamon to ochraceous 

 buff, sometimes thinly frosted with 

 white; below pale ochraceous or yellow- 

 ish; fur of upper side of interfemoral 

 membrane mostly reddish throughout. „, ^ 



-' ° Western Red Bat. 



Length about no mm. (4.33 inches); tail vertebrae 50 

 ( 1.95) ; ear from crown 6 (.23) ; expanse of wings 315 ( 12.40). 



Type locality, California. 



Western Red Bats are found in the valleys and foothills of 

 central and southern California and L-ower California. All that 

 I have seen were found in spring and summer hanging- among 

 the foliage of fruit trees in orchards. They appear to be rare. 



