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.

Type.—Male, adult, skull and skin, No. 29387/41462 U. S. Nat. Mus. Biol. Surv. Coll.; from Black Canyon, 8,200 ft., White Mountains, Inyo County, California; obtained on July 7, 1891, by E. W. Nelson; original No. 1069.

Diagnosis.—Size medium; sides light; general tone of upper parts light; baculum one of largest in species.

Description.—Color pattern: Head Smoke Gray mixed with Pink-Cinnamon; upper two pairs of facial stripes Fuscous Black or black; submalar stripe Sayal Brown; ear Fuscous or Chaetura-Drab, posterior margin and postauricular patch buffy white; median dorsal dark stripe black with Sayal Brown along margins; lateral dorsal dark stripes black mixed with Sayal Brown or Mikado Brown; outermost dorsal dark stripes Sayal Brown or Mikado Brown mixed with black; sides Ochraceous-Tawny or Tawny; thighs Cinnamon-Buff mixed with Smoke Gray; antipalmar and antiplantar surfaces of feet Cinnamon-Buff; ventral surface of tail Cinnamon-Buff or Ochraceous-Tawny with Fuscous Black around margin and Pinkish Buff around outermost edge; underparts creamy white. Skull: Large; zygomata strong; braincase moderately inflated. Baculum: One of largest in species.

Comparisons.—For comparisons with E. u. umbrinus, E. u. adsitus, E. u. sedulus, and E. u. nevadensis, see the accounts of those subspecies.

Specimens examined.—Total number, 46.

Nevada: Elko Co.: Head Ackler Creek, N end Ruby Mountains, 1; Steels Creek, N end Ruby Mountains, 1; Summit Secret Pass, 6,200 ft., Ruby Mountains, 2; Three Lakes, Ruby Mountains, 11; Long Creek, S fork, Ruby Mountains, 4; Harrison Pass R. S., Green Mountain Canyon, 1; W side Ruby Lake, 6 mi. N Elko Co. line, 3; W side Ruby Lake, 3 mi. N Elko Co. line, 8. White Pine Co.: Willow Creek, 2 mi. S White Pine Co. line, Ruby Mountains, 6; W side Ruby Lake, 3 mi. S White Pine Co. line, 5; Overland Pass, E slope Ruby Mountains, 8 mi. S White Pine Co. line, 2.

Utah: Boxelder Co.: Head of George Creek and Clear Creek, 5 mi. S Stanrod, Raft River Mountains, 8,500 ft., 2 UU.

Type.—Male, adult, skull and skin, No. 15884 Donald R. Dickey Collection; from Hidden Forest, Sheep Mountains, 8,500 ft., Clark County, Nevada; obtained on July 13, 1929, by W. H. Burt; original No. 2337.

Diagnosis.—Size medium; general tone of upper parts grayish; baculum one of the largest of species.

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).

Specimens