110 Proceedings of the Biological Society of Washington. 



Color. — Type (summer pelage): Upperparts light pinkish cinnamon, 

 mixed with fuscous; sides of nose pale smoke gray; sides of face, occiput, 

 and nape washed with the same ; ears chaetura drab, margined with grayish 

 white and faintly washed with the same inside ; sides light pinkish cinnamon ; 

 feet grayish white, washed with light pinkish cinnamon; soles chaetura 

 drab; palms grayish white, washed with drab; underparts grayish white, 

 washed with light pinkish cinnamon. Winter pelage: Closely similar to 

 schisticeps in the corresponding pelage, but slightly darker. 



Skull. — Closely similar to that of schisticeps. 



Measurements. — Average of 12 adults (6 males, 6 females) from type 

 region: Total length, 182 (165-195); hind foot, 31 (30-32). Skull— Type 

 (cT adult): Occipito-nasal length, 42.6; zygomatic breadth, 21.6; breadth 

 of cranium, 19; interorbital breadth, 5.2; width of palatal bridge, 1.5: 

 length of nasals, 13.7. 



Remarks. — The pika of the Blue Mountains is most nearly related to 

 0. schisticeps schisticeps of the high Sierra Nevada; its range, however, 

 is separated from that of schisticeps by the intervening lava bed region, 

 occupied by O. schisticeps taylori. 



Ochotona schisticeps fuscipes, subsp. nov. 



Type. — No. 158,094, U. S. National Museum, Biological Survey collec- 

 tion; cT adult, skin and skull; from Brian Head, Parawan Mts., Utah; 

 Collected September 7, 1908, by Wilfred H. Osgood; original number 3475. 



Subspecific characters. — Similar to O. cinnamomea but larger, with larger 

 and relatively broader skull; coloration above more blackish and less in- 

 tensely cinnamon; very similar to 0. schisticeps taylori, but general tone 

 pinkish cinnamon, rather than vinaceous cinnamon; head paler and more 

 grayish; underparts paler. 



Color. — Type (summer pelage): Upperparts mixed light pinkish cinna- 

 mon and fuscous-black (the blackish prevailing); tip of nose fuscous-black; 

 sides of nose and face smoke gray, tinged with buff and washed with fuscous; 

 back of head and nape washed with pale neutral gray; ears fuscous-black, 

 margined with buffy white; sides pinkish cinnamon mixed with fuscous, 

 becoming clear pinkish cinnamon along line of belly; hind feet soiled whit- 

 ish, washed with pale cinnamon-buff, the soles fuscous; front feet cinnamon- 

 buff, the palms hair-brown; underparts grayish white, heavily washed with 

 pinkish cinnamon. 



Skull. — Similar to that of cinnamomea, but larger and relatively broader, 

 with larger audital bullae. 



Measurements. — Type (adult cT): Total length, 195; hind foot, 30.5; 

 average of 4 adult females: 201; 30.2. Skull (of type): Occipito-nasal 

 length, 41.7; zygomatic breadth, 21.4; interorbital breadth, 5; width of 

 palatal bridge, 1.4; length of nasals, 12.3. 



Remarks. — This race, at present known only from the Parawan Range, 

 is based on a series of 5 adults and one young in summer pelage. Although 

 occupying a range of mountains practically continuous with the Beaver 

 Range — the home of O. cinnamomea — the present form is apparently much 

 more closely related to schisticeps of the northern high Sierra and to taylori 

 of southern Oregon that it is to cinnamomea. Its range is separated, how- 

 ever, from the ranges of these forms by a broad expanse of desert. 



