Vol. XIII. pp. 153-158 June 13, 1900 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTIONS OF TWO NEW MAMMALS FROM 

 SOUTHERN CALIFORNIA. 



1!Y F. STEPHENS. 



Perognathus panamintinus arenicola subsp. nov. 



Typf from San Felipe Narrows, San Diego Co., California. No. 90,828, 

 (f , U. S. Nat. Mus., Biological Survey Coll. Collected April 11, 1892 by 

 F. Stephens. Orig. No; 20r)(i. 



Chai'dcierK. — Similar to P. panamintinus bangsi but paler and whiter: 

 mastoids greatly swollen and projecting much further back than the 

 occiput; interparietal very small. ^ 



Measurements. — Total length, 141: tail vertebne, 82: hind foot, 19. 



Myotis californicus pallidus subsp. nov. 



Ti/jie from Vallecito, San Diego Co., California. No. 99,829, ^, U. S. 

 Nat. Mus., Biological Survey Coll. Collected April 1, 1895 by F. 

 Stephens. Orig. No. 2498. 



Characters. — Size small; wings short, wing membrane thin and light; 

 ears small: general appearance delicate, color very pale: light ochraceous 

 buff or brownish cream bviff; below dull white: basal part of pelage 

 above and below blackish. 



Measurements. — Total length, 80; expanse, 208: tail vertebrae, 42; ear, 

 11: thumb, 4: forearm. 80; tibia, 15. 



;«— Bioi.. Sof. Wash. Voi,. XIII. 190(i. (153) 



