his chipmunk,
which normally is shy and wary.

_Specimens examined._--Total number, 6.

_Sweetwater Co._: W side Green River, 1 mi. N Utah border, 6.

_Additional records_ (Howell 1929:134): _Sweetwater Co._: Green
River, 4 mi. NE Linwood, Utah.

[Illustration: FIG. 3. Known occurrences and probable geographic
distribution of the subspecies of _Eutamias umbrinus_ in Wyoming. See
figure 1 for explanation of symbols.

1. _E. u. umbrinus_
2. _E. u. fremonti_
3. _E. u. montanus_]

Eutamias umbrinus (J. A. Allen)

_Diagnosis._--Size large; general tone of upper parts dark; base of
baculum widened; outermost dorsal dark stripe barely discernible or
lacking; skull rarely shorter than 34.0 mm.

_Comparisons._--For comparisons with the other species of
_Eutamias_ in Wyoming, see the accounts of _E. minimus_, _E.
amoenus_, and _E. dorsalis_.

_Remarks._--_E. umbrinus_ is the largest of the species of _Eutamias_
occurring in Wyoming. This species usually occurs in the Canadian and
Hudsonian life-zones in the mountains of northwestern, southwestern,
and south-central Wyoming.

Eutamias umbrinus umbrinus (J. A. Allen)

_Tamias umbrinus_ J. A. Allen, Bull. Amer. Mus. Nat. Hist. 3:96,
June, 1890.

_Eutamias umbrinus_, Miller and Rehn, Proc. Boston Soc. Nat. Hist.,
30:45, December 27, 1901.

_Type._--Male, adult, skull and skin, No. 186463 (NM); from Blacks
Fork, about 9,500 ft., Uinta Mountains, Summit County, Utah;
obtained on September 19, 1888, by Vernon Bailey; original No. 228.

_Diagnosis._--Size medium; over-all tone of upper parts dark and
shadowy; skull smallest of this species in Wyoming.

_Description._--_Color pattern_: Crown Pale Smoke Gray; facial
stripes Fuscous Black or Snuff-Brown; ears Fuscous Black; posterior
margin of ear and postauricular patch grayish white; median dorsal
dark stripe black with Sayal Brown along margins; lateral pair of
dorsal dark stripes Fuscous Black mixed with Sayal Brown, or
entirely Sayal Brown; outermost pair of dorsal dark stripes Sayal
Brown mixed with Fuscous Black or lacking; sides Sayal Brown mixed
with Cinnamon; rump and thighs Sayal Brown mixed with Smoke Gray;
antipalmar and antiplantar surfaces of feet Cinnamon Buff;
underside of tail Ochraceous Tawny or Sayal Brown, with Fuscous
Black around margin and Pinkish Buf