Order ' Lagomorpha. 



Family Ochotonidae. Pikas. 

 Genus Ochotona (109). 



Ochotona albatus Grinnell. 



Ochotona albatus Grinnell, Univ. Calif. Publ. Zool., X, 1912, p. 125. 



Type locality. Near Cottonwood Lakes, Sierra Nevada Moun- 

 tains, Inyo County, California. Altitude nooo-feet. 



Ochotona fenisex Osgood. 



Lagomys minimus Lord, Proc. Zool. Soc. Lond., 1863, p. 98. 



Ochotona minimus Elliot, Syn. N. Am. Mamm., F. C. M. Pub. II, 

 1901, p. 269. Zool. Ser. 



According to Mr. W. H. Osgood, Proc. Biol. Soc. Wash., XXVI, 

 1913, p. 80, the term minima, bestowed by Lord (/. c.) on this species 

 is preoccupied by Lagomys minimus Schinz, Das Thierreich, I, 1821, 

 p. 320, and he proposes in its place Ochotona fenisex, by which name the 

 species will be hereafter known. 



Ochotona nigrescens Bailey. 



Ochotona nigrescens Bailey, Proc. Biol. Soc. Wash., XXVI, 1913, 



P- 133- 



Type locality. Je'mez Mountains, New Mexico. Altitude 10000 

 feet. 



Genl. Char. Colors very dark. 



Color. Upperparts cinnamon-brown, the hairs tipped with black; 

 throat and median part of belly cinnamon-brown; rest of underparts 

 pale buff; plumbeous under-fur showing; feet above whitish; soles 

 of hind feet blackish, outer surface of ear black, inner surface dark 

 gray with black band near tip. Ex type in United States National 

 Museum. 



Measurements. Total length, 200; hind foot, 30. Skull, broken: 

 Zygomatic width, 21; intertemporal width, 5.3; length of nasals, 38; 

 length of upper molar series, 8; length of mandible, 22 ; length of lower 

 molar series, 7.8. Ex type in United States National Museum. 



1 See Lyon, Smith. Misc. Coll., 1912, p. 321. 



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