Tamias amoenus affinis Allen
Tamias quadrivittatus affinis [Allen], Amer. Mus. Nat. Hist. Bull., 3:103, June, 1890.
Eutamias quadrivittatus affinis [Miller] and Rehn, Proc. Boston Soc. Nat. Hist., 30:44, December 27, 1901.
Eutamias amoenus affinis [Howell], Jour. Mamm., 3:184, August 4, 1922.
Tamias amoenus affinis [Ellerman], Fam. and Genera of Living Rodents, British Mus. Nat. Hist., p. 432, June 8, 1940.
Type.—Obtained at Ashcroft, British Columbia, by C. P. Streator on July 3, 1889; type in United States National Museum.
Racial characters.—Small size, grayish color including rump, and white underparts.
Measurements.—Fourteen males and 7 females from Washington average: total length 201.5; length of tail 86.5; hind foot 31.7; ear 17.2.
Distribution.—The eastern slope of the Cascade Mountains. Marginal records on the west are: Bald Mountain ([Howell], 1929:73), Mazama ([Howell], 1929:73), Hart Lake ([Howell], 1929:73), Lake Wenatchee (W. W. D.), 10 mi. S. Dryden (W. W. D.), Blewett Pass (W. W. D.), 10 mi. N. W. Ellensburg (W. W. D.), Wenas Creek (W. W. D.), Mt. Adams ([Howell], 1929:73), and Lyle ([Howell], 1929:73). Marginal occurrences on the east are: Mt. Chopaka ([Howell], 1929:73), 20 mi. E. Tonasket (W. W. D.) and Omak Lake ([Howell], 1929:73).