Eutamias canicaudus [Merriam], Proc. Biol. Soc. Washington, 16:77, May 29, 1903.
Eutamias amoenus canicaudus [Howell], Jour. Mamm., 3:184, August 4, 1922.
Tamias amoenus canicaudus [Ellerman], Fam. and Genera of Living Rodents, British Mus. Nat. Hist., p. 432, June 8, 1940.
Type.—Obtained at Spokane, Spokane County, Washington, by C. P. Streator, on April 11, 1891; type in United States National Museum.
Racial characters.—Large size, pale color, grayish tail, white or buffy underparts.
Measurements.—Thirteen topotypes average: total length 227.2; length of tail 104.4; hind foot 33.7; ear 14.
Distribution.—The pine-covered lowlands along the central-eastern border of the state, ranging, according to [Howell] (1929: 71), from Spokane County south to Pullman.
Tamias amoenus luteiventris [Allen]
Tamias quadrivittatus luteiventris [Allen], Amer. Mus. Nat. Hist. Bull., 3:101, June, 1890.