Part 4

Diagnosis.--Size medium; sides dark; general tone of upper parts dark; dorsal light and dark stripes strongly contrasting.

Description.--Color pattern: Head Cinnamon mixed with grayish white; stripe on margin of crown Verona-Brown or Bister; ocular stripe Fuscous Black mixed with Sayal Brown; submalar stripe Sayal Brown; ear Fuscous, Sayal Brown along anterior margin and Smoke Gray along posterior margin and on postauricular patch; median dorsal stripe black; lateral dorsal dark stripes Fuscous Black mixed with Russet; outermost dorsal dark stripes slightly darker or indistinguishable from sides in color; dorsal light stripes grayish white with Mikado-Brown along margins; outermost pair of dorsal light stripes nearly pure white; sides Russet mixed with Cinnamon or Ochraceous-Tawny; rump and thighs Smoke Gray mixed with Cinnamon-Buff, with a larger or smaller number of Fuscous Black hairs; antipalmar and antiplantar surfaces of feet Cinnamon-Buff; dorsal surface of tail black; ventral surface of tail Sayal Brown to Tawny; underparts white with dark underfur. Skull and Baculum: As in E. u. umbrinus.

Comparisons.--From E. u. inyoensis, the subspecies to the west, E. u. adsitus differs in: General tone of upper parts darker; sides darker; interorbital region wider; skull significantly deeper.

For comparison with E. u. umbrinus, E. u. sedulus, and E. u. montanus, see the accounts of those subspecies.

Remarks.--Specimens from West Rim, Zion National Park, 6,500 ft., Washington County, Utah, seem to be intergrades between E. u. adsitus and E. u. inyoensis, and are referable to E. u. adsitus.

Specimens examined.--Total number, 34.

=Utah=: Beaver Co.: Britts Meadow, Beaver Range Mountains, 8,500 ft., 13 BS. Wayne Co.: Donkey Lake, Boulder Mountain, 10,000 ft., 4 UU. Garfield Co.: Wildcat R. S., Boulder Mountain, 8,700 ft., 5 UU.

=Arizona=: Coconino Co.: De Motte Park, Kaibab Plateau, 3 BS; Bright Angel, Kaibab Plateau, 9 BS.

=Eutamias umbrinus sedulus= new subspecies

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.

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.

Remarks.--The baculum in E. u. inyoensis is like that in E. palmeri.

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.

=Eutamias umbrinus nevadensis= Burt