268 OCHOTONA. 



Geiil. Char. Head gray; anterior margin of palate produced for- 

 ward in a sharp point; supraoccipital appears in the vault of the 

 cranium as a narrow bridge between the mastoids. 



Color. Top of head from nose to nape, slate graj; rest of upper 

 parts suffused with fulvous deepest on sides; black tipped hairs dis- 

 tributed over back. Feet and under parts white washed with fulvous; 

 soles of hind feet dusky; fore feet yellowish white. 



Mcasiiremetits. Total length, i88; tail vertebra, 9.5; hind foot, 

 29.5; ear from crown, 6. 



408. collaris. (Zi^^'^wrj-), Nelson Proc. Biol. Soc. Wash., 1893, p. 117. 

 Type locality. Near head of Tanana River, Alaska. 



Geogr. Dislr. Mountains south of Fort Yukon from head of 

 Tanana River to the Chigmit Mountains near the head of Bristol Bay, 

 Alaska. 



Genl. Char. Ears thickly haired, iron gray collar; palatine 

 bridge broad and heavy and slightly concave on both borders, " angu- 

 lar process of mandible terminates in a short point rising vertically 

 behind the concavit}' of the notch." 



Color. Above nearly uniform grizzled gray, tinged with yellow- 

 ish on crown and back. A broad iron-gray collar on back and sides 

 of neck, chin and throat white. Back of ear a pale ashy patch; a 

 dull gray band behind white throat; yellowish spot on each side of 

 throat; feet, legs and under parts white; soles of feet smoky brown; 

 margin of ear pale grayish white; the interior has a yellowish band 

 across middle and a black bar along edge. 



Measurements. Total length, 182; hind foot, 28.3; ear, 19. i. 



409. cuppes. {Ochotona), Bangs, Proc. New Engl. Zool. Club, 1899, 



p. 40. 



Type locality. Monishe Divide, Gold Range, British Columbia. 



Geogr. Dislr. Gold Range, British Columbia. 



Genl. Char. "Colors dark with much tawny on head, neck and 

 under parts; skull similar to that of O. minimus, with short nasals 

 and rostrum, rather large audital bulla;, and short palatine fossa." 



Color. Above rich brown; cheeks, sides of neck and lower sides 

 tawny ochraceous mixed with black; patch of buff behind ears; chin 

 buffy, band beneath neck tawny ochraceous; under parts dull och- 

 raceous, base of fur slate gray; feet above buffy; soles dusky; border 

 of ears white; grayish band inside below border. 



Measurements. Total length, 190: hind foot, 30. 



410. saxatilis. {Ochotona), Bangs, Proc. New Eng. Zool. Club, 1899, 



p. 41. 

 Type locality. Snowy Range, Montgomery Park County, Colorado. 



