Eutamias quadrivittatus luteiventris [Miller] and Rehn, Proc. Boston Soc. Nat. Hist., 30:44, December 27, 1901.
Eutamias amoenus luteiventris, [Howell], Jour. Mamm., 3:179, August 4, 1922.
Tamias amoenus luteiventris [Ellerman], Fam. and Genera of Living Rodents, British Mus. Nat. Hist., p. 432, June 8, 1940.
Type.—Obtained at Chief Mountain Lake (Waterton Lake), Alberta (3-1/2 mi. N. United States boundary) by Elliott Coues on August 24, 1874; type in United States National Museum.
Racial characters.—Small size, rich color, buffy underparts.
Measurements.—Twelve males and 12 females from the Blue Mountains, Columbia County, average respectively: total length 212, 219; length of tail 96.7, 101; hind foot 31.7, 32.5; ear 17.3, 18; weight 46.5, 52.8 grams.
Distribution.—The Blue Mountains of southeastern Washington, and the Pend Oreille Mountains of northeastern Washington, west to Eureka, in the Kettle River Mountains, Ferry County ([Howell], 1929: 69), and south to Newport (W. W. D.).
Tamias ruficaudus simulans ([Howell])
Red-tailed chipmunk
Eutamias ruficaudus simulans [Howell], Jour. Mamm., 3:179, August 4, 1922.
Tamias ruficaudus simulans [Ellerman], Fam. and Genera of Living Rodents, British Mus. Nat. Hist., p. 434, June 8, 1940.