_Description._--"General tone of upperparts grayish; median dorsal stripe, extending from crown between ears to rump, black faintly bordered with 'verona brown'; lateral dark dorsal stripes similar to median stripe, but with anterior one-third deeply suffused with 'verona brown'; central light dorsal stripes grayish, slightly lighter than head and rump; lateral stripes white; head and rump 'pale smoke gray'; postauricular patch grayish white, a narrow margin extending up posterior border of ear; anterior portion of ear 'fuscous black' mixed with 'verona brown' at base and bordered by light gray; ocular stripe black grading into 'verona brown' in front of ear; submalar stripe nearly obsolete, 'sayal brown'; sides of body grayish washed with 'verona brown'; feet grayish very faintly washed with 'pinkish buff'; dorsal surface of tail black overlaid with 'tilleul buff'; ventral surface of tail 'cinnamon buff' narrowly bordered by black then by 'tilleul buff'; ventral surface of body white." (Burt 1931:299.) Skull similar to that of _E. u. inyoensis_ but differing as indicated below. _Comparisons._--From _E. u. inyoensis_, the subspecies to the north, _E. u. nevadensis_ differs in: Paler and grayer throughout; tawny areas restricted; gray areas clearer and less suffused; dark facial markings narrower and less distinct; ventral surface of tail distinctly paler; feet lighter, clearer gray; nasals extend farther posteriorly with respect to premaxillae (Burt _loc. cit._). From _E. u. adsitus_, the subspecies to the northeast, _E. u. nevadensis_ differs in: Narrower dorsal stripes and facial markings; paler coloration of head, rump, sides, feet, and ventral surface of tail (Burt _op. cit._: 299-300). _Remarks._--The differences between _E. umbrinus nevadensis_ and _E. palmeri_, as shown by Burt (_op. cit._) and Hall (1946), are such that one might expect _E. palmeri_ to be a subspecies of _E. umbrinus_. However, having only the structure of the baculum as evidence additional to that summarized by Hall (_op. cit._), I follow him in according _E. palmeri_ specific status. _Specimens examined._--None. =Eutamias umbrinus fremonti= new subspecies _Type._--Male, adult, skull, skin, and baculum, No. 41790 Univ. Kansas Mus. Nat. Hist.; from 31 mi. N Pinedale, 8,025 ft., Sublette County, Wyoming; obtained on July 8, 1951, by Rollin H. Baker; original No. 1596. _Diagnosis._--Size large; sides Capucine Yellow; antiplantar surface of hind feet Raw Sienna; postauricular patch grayish white; baculum as in _E. u. umbrinus_.