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, crowded out 

 on the tongue side of the canine; upper side of the interfemoral 

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

 ftirred ; 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 ; ])erfect— 



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 varying 

 from tawny or cinnamon to ochraceous 

 buf¥, sometimes thinly frosted with 

 white; below pale ochraceous or yellow- 

 ish ; fur of upper side of interfemoral 

 membrane mostlv reddish throughout. 



* Western Red Bat. 



Length about no mm. (4.33 inches); tail vertebne 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 ot 

 central and southern California and Lower 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. 



