Racial characters.—Size small; tail short; color pale, varying from buffy gray to rich buff; rarely dark reddish brown.
Measurements.—Twenty-five males and 15 females average: total length 160; length of tail 71; hind foot 19.8; ear 17.7.
Distribution.—The Columbian Plateau. Intergradation with oreas occurs between the Columbia River and the Cascade Mountains. Marginal records on the west are: Chelan (W.W.D.), Leavenworth (W.W.D.), Cle Elum (W.W.D.), Satus Pass (W.W.D.), Lyle (V.B.S.). Marginal localities on the north are: Chelan (W.W.D.), 5 miles north of Coulee (W.W.D.), Sprague (V.B.S.) and Steptoe Butte (M.V.Z.).
Peromyscus maniculatus artemisiae ([Rhoads])
Sitomys americanus artemisiae [Rhoads], Proc. Acad. Nat. Sci. Philadelphia, p. 260, October 23, 1894.
Peromyscus texanus artemisiae [Miller] and Rehn, Proc. Boston Soc. Nat. Hist., 30:84, December, 1901.
Peromyscus maniculatus artemisiae [Osgood], N. Amer. Fauna, 28:58, April 17, 1909.
Type.—Obtained at Ashcroft, British Columbia, by S. N. [Rhoads] on July 5, 1892; type in Philadelphia Academy of Sciences.
Racial characters.—Similar to gambelii but darker, more reddish; often with longer tail.
Measurements.—Ten males and 10 females from northeastern Washington average: total length 167; length of tail 80; hind foot 20; ear 17.8.