Perognathus parvus parvus (Peale)
Cricetodipus parvus Peale, U. S. Explor. Exped., 8 (mamm. and ornith.):53, 1848.
Perognathus parvus Cassin, U. S. Explor. Exped., 8 (mamm. and ornith.):48, 1858.
Perognathus parvus parvus [Miller], Bull. U. S. Nat. Mus., 128:278, April 29, 1924.
Fig. 93. Distribution of the Great Basin pocket mouse in Washington. A. Perognathus parvus parvus. B. Perognathus parvus columbianus. C. Perognathus parvus lordi.
Type.—Probably obtained in the neighborhood of The Dalles, Wasco County, Oregon.
Racial characters.—Size small; upper parts brownish-buff washed with blackish or, in gray phase, ashy gray washed with blackish; sides buffy yellow; a buffy spot often present on throat; tail blackish above, olive below; facial markings usually brownish-buff but in older animals indistinct and washed with blackish.