Type.—Male, adult, skull, skin, and baculum, No. 158181 U. S. Nat. Mus. Biol. Surv. Coll.; from Mount Ellen, Henry Mountains, Garfield County, Utah; obtained on October 13, 1908 by W. H. Osgood; original No. 3667.
Diagnosis.—Size medium; general tone of upper parts dark reddish-brown; ventral surface of tail Ochraceous-Orange; sides Mars Yellow.
Description.—Color pattern: Crown Drab-Gray mixed with Fuscous; upper facial stripe Fuscous Black mixed with Sudan Brown; ocular stripe Sudan Brown mixed with black; submalar stripe Sudan Brown slightly mixed with black; anterior margin of ear Sudan Brown slightly mixed with black; hairs inside pinna, posteriorly, Warm Buff; posterior margin of ear and postauricular patch creamy white; median dorsal dark stripe black with Antique Brown along margins; lateral dorsal dark stripes black mixed with Antique Brown; outermost dorsal dark stripes Xanthine Orange slightly mixed with black; median dorsal light stripes Pale Smoke Gray; outermost dorsal light stripes white slightly mixed with gray; rump and thighs Smoke Gray; sides Mars Yellow; dorsal surface of tail black mixed with Warm Buff; ventral surface of tail Ochraceous-Orange, with black around margin, and Warm Buff around outermost edge; antipalmar and antiplantar surfaces of feet Ochraceous-Buff; underparts creamy white with dark underfur. Skull: Large; braincase moderately inflated; zygomata strong. Baculum: As in E. u. umbrinus.
Comparisons.—From E. u. umbrinus, the subspecies from the Uinta and northern Wasatch Mountains of Utah, E. u. sedulus differs in: General tone of upper parts lighter; sides lighter.
From E. u. adsitus, the subspecies from the southern Wasatch Range in Utah and Kaibab Plateau in Arizona, E. u. sedulus differs in: Sides lighter; general tone of upper parts markedly lighter.
From E. u. inyoensis, the subspecies from central and northeastern Nevada, and western and northwestern Utah, E. u. sedulus differs in: Sides lighter (less grayish); general tone of upper parts tawnier.
For comparison with E. u. montanus, see the account of that subspecies.
Specimens examined.—Total number, 7 BS, all from the type locality.
Eutamias umbrinus inyoensis Merriam
Eutamias speciosus inyoensis Merriam, Proc. Biol. Soc. Washington, 11:202, 208, July 1, 1897.