[Illustration: FIG. 81. Distribution of the yellow-pine chipmunk in Washington. A. _Tamias amoenus luteiventris._ B. _Tamias amoenus canicaudus._ C. _Tamias amoenus affinis._ D. _Tamias amoenus ludibundus._ E. _Tamias amoenus felix._ F. _Tamias amoenus caurinus._] _Type._--Obtained at Church Mountain, British Columbia, near the United States boundary by Allan Brooks on August 13, 1895; type in Philadelphia Academy of Natural Sciences. _Racial characters._--Large size and rich, dark color. _Measurements._--Ten topotypes average: total length 224.7; length of tail 98.8; hind foot 34.1; ear 14.4. _Distribution._--The extreme northwestern Cascades, north and west of Mt. Baker. _Remarks._--This richly-colored coastal race barely enters Washington. It is abundant near Goldrun Pass and Tomyhoi Lake, Whatcom County, just south of the international boundary. =Tamias amoenus ludibundus= (Hollister) _Eutamias ludibundus_ Hollister, Smithsonian Misc. Coll., 56 (no. 26):1, December 5, 1911. _Eutamias amoenus ludibundus_ Howell, Jour. Mamm., 3:184, August 4, 1922. _Tamias amoenus ludibundus_ Ellerman, Fam. and Genera of Living Rodents, British Mus. Nat. Hist., p. 432, June 8, 1940. _Type._--Obtained at Yellowhead Lake, 3,700 ft., British Columbia, by N. Hollister on August 29, 1911; type in United States National Museum. _Racial characters._--Moderate size, brownish rump, ochraceous sides. _Measurements._--Five males and 4 females from the higher parts of the Cascades average, respectively: total length 210, 217; length of tail 89, 90; hind foot 33, 33; ear 17.4, 16.7; weight 50, 59.7 grams. _Distribution._--The higher Cascade Mountains. Marginal records are: Barron (Howell, 1929:75), Lyman Lake (Howell, 1929:75), Cascade Tunnel (W. W. D.), Mt. Stuart (W. W. D.), Lake Kachees (W. W. D.), Boulder Cave (W. W. D.), and Mt. St. Helens (Howell, 1929:75). _Remarks._--At the higher altitudes this race seems to be the equivalent of _affinis_. The latter race lives in relatively arid yellow pine forests and _ludibundus_ occupies more moist and varied habitats higher in the mountains. =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.