Fuscous Black around margin and Pinkish
Buff around outermost edge; underparts creamy white with
dark gray underfur. _Skull_: Large, with moderately inflated
braincase and well developed zygomata. _Baculum_: One of the
largest in the species.

_Comparisons._--From _Eutamias umbrinus adsitus_, the
subspecies to the south on the Wasatch Range, _E. u.
umbrinus_ differs in: Sides lighter; rump browner; hairs
around outermost edge of tail tawnier (in freshly molted
tails); shorter inner mandibular length.

From _E. u. inyoensis_, the subspecies to the west in central
and northeastern Nevada and in northwestern Utah, _E. u.
umbrinus_ differs in: General tone of upper parts lighter;
sides lighter; total length more; interorbital region
broader.

For comparisons with _E. u. sedulus_, _E. u. fremonti_, and
_E. u. montanus_, see the accounts of those subspecies.

_Specimens examined._--Total number, 55.

=Wyoming=: _Uinta Co._: 9 mi. S Robertson, 8,000 ft., 15;
10 mi. S and 1 mi. W Robertson, 8,700 ft., 5; 11-1/2 mi. S
and 2 mi. E Robertson, 9,200 ft., 1; 2 mi. E and 12 mi. S
Robertson, Ashley Nat. For., 1; 13 mi. S and 2 mi. E
Robertson, 9,200 ft., 1.

=Utah=: _Rich Co._: Monte Cristo, 18 mi. W Woodruff, 8,000
ft., 2 UU. _Summit Co._: 13-1/2 mi. S and 2 mi. E Robertson
[Wyoming], 4; 1 mi. N Bridger Lake R. S., 9,400 ft., 4.
_Wasatch Co._: Snake Creek Canyon, 3 mi. NW Midway, 6,000
ft., 1 UU. _Uintah Co._: Paradise Park, 21 mi. W and 15 mi.
N Vernal, 10,050 ft., 20.

=Eutamias umbrinus adsitus= J. A. Allen

_Eutamias adsitus_ J. A. Allen, Brooklyn Institute
Mus. Sci. Bull. 1:118, March 31, 1905.

_Type._--Unsexed adult, skull and skin, No. 28728 Amer. Mus.
Nat. Hist.; from Briggs Meadow, 10,000 ft., Beaver Mountains,
Utah; obtained on August 20, 1904, by George P. Engelhardt.

_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 stri