Type locality. Black Hills, South Dakota. 



Giogr. Distr. Black Hills of South Dakota and adjoining parts 

 of Wyoming. 



Genl. Char. Size larger than .S^. h. loqua.x ; colors paler. 



Color. Winter Pelage. Dorsal line yellowish rufous; rest of 

 upper parts and outside of limbs and feet, yellowish gray; beneath 

 white; tail above like back with narrow black border and fulvous 

 fringe; beneath pale gray in center shading into pale fulvous, bor- 

 dered and fringed as on upper part. 



Summer Filage. Above yellow olive gray; no lateral line; out- 

 side shoulders, feet and edge of thighs, yellowish rufous; beneath 

 pure white; tail above yellowish rufous, bordered and fringed as in 

 winter, beneath grizzled, yellowish in center. 



Measurements. Total length, 338-356; tail vertebra% 143-149; 

 hind foot, 50-52. 



e.—haileyi. (Seiums), Allen, Bull. Am. Mus. Nat. Hist., 1S9S, p. 261. 



Type locality. Big Horn Mountains, Wj'oming. 



Geogr. Distr. Mountain ranges of Central Wyoming and East- 

 ern Montana, north into Alberta, in eastern foothills of the Rocky 

 Mountains. 



Genl. Char. Pale dorsal band, tail narrowly bordered with 

 black, size large. 



Color. Summer Pelage. Above yellowish olivaceous; fore legs 

 and feet, edge of thighs and hind feet ochraceous orange; black lateral 

 line; beneath white washed with yellow; tail above cherry red to yel- 

 lowish red, grizzled, bordered with black and fringed with yellow; 

 lower surface pale yellowish gray grizzled with black, bordered and 

 fringed like upper part. 



Measurements. Total length, 313-359; tail vertebra;, 121-145; 

 hind foot, 49-53. 



f.—ventorum. (.Sciurus), Allen, Bull. Am. Mus. Nat. Hist., 1898, 

 p. 263. 



Type locality. South Pass City, Wyoming. 



Geogr. Distr. Wind River Mountains north to Mystic Lake, 

 west to head of Snake River in Idaho, south to Wahsatch Range, 

 northeastern Utah. 



Genl. Char. Dorsal line and back dark red; apical third of tail 

 black; size large. 



Color. Winter Pelage. Upper parts, legs and feet yellowish 

 gray; dorsal line dark rufous; lateral line dusky; beneath white; tail 

 above yellowish rufous bordered with black and fringed with yellow; 

 beneath grizzled gray. 



