Geogr. Dislr. Mt. Baker Range, British Columbia, extent un- 

 known. 



Genl. Char. Darker than T. quadrivittatus, or T. lutdventris, 

 more nearly resembling the latter. 



Color. Colors and pattern as in T. quaJrivittatus, but darker. 

 From T. luteiventris it differs in a deeper orange on cheeks, sides and 

 tail; head, shoulders, neck and upper part of back rusty brown; dor- 

 sal black stripes broad; light stripes rusty; upper parts not hoary. 



Measurements. Total length, 245; tail vertebrse, 105; hind 

 foot, 32.5. 



d. affinis. (Tamias), Allen, Bull. Am. Mus. Nat. Hist., 1890, p. 103. 



Type locality. Ashcroft, British Columbia. 



Geogr. Distr. Interior of British Columbia, east of the Cascade 

 Mountains. 



Genl. Char. Similar to T. quadrivittatus, but larger. 



Color. .Spring Pelage. Above yellowish gray brown; sides 

 brownish ochre; beneath grayish white, tinged with fulvous. Dark 

 •dorsal stripes black, light ones gray mixed with rufous; outer ones 

 yellowish white. Dark facial stripes rusty brown and black, light 

 ones brownish white. Tail, above black and pale ochraceous; 

 beneath orange rufous bordered with black and fringed with pale 

 ochraceous. 



Breeding Pelage. Above ashy gray, sides tinged with yellowish; 

 tail thin, below pale yellowish rufous, yellow fringe mostly worn 

 away. 



Post-breeding Pelage. Gray suffused with yellowish rufous; 

 thighs and rump ash gray; flanks deep ochre. Facial and dorsal 

 stripes like spring phase. 



Measurements. Average total length, 125; tail to end of hairs, 

 120; hind foot, 31.5. 



e.—borealis. (Tamias), Allen, Mon. N. .\m. Rodent., 1877, p. 793 

 (Part). 



Type locality. Fort Liard, British .\merica. 



Geogr. Distr. Northern North America, Hudson Bay to eastern 

 base of Rocky Mountains, also in North and South Dakota and Mon- 

 tana. 



Genl. Char. Smaller than 7". <///(j(//7r//'/(Z/«j-, more yellow on sides, 

 and on light dorsal streaks. 



Color. Autumn Pelage. Above pale yellowish gray; dark dorsal 

 streaks black; light ones gray; outer one white tinged with yellow- 

 ish: sides washed with yellowish brown; thighs and rump yellowish 

 grav; ventral surface grayish white tinged sometimes with buff. 



