ter County, Wyoming. Age, sex, collector, and date when
obtained, not surely known.

_Diagnosis._--Size small; general tone of upper parts pale grayish
brown; baculum small.

_Description._--_Color pattern_: Crown Pinkish Buff mixed with
grayish white; facial stripes Snuff Brown mixed with black;
anterior margin of ear Drab washed with Cinnamon; hairs inside
posterior part of pinna Light Pinkish Cinnamon; posterior margin of
ear and postauricular patch grayish white; median dorsal dark
stripe black with Sayal Brown along margins; lateral pair of dark
stripes Sayal Brown more or less mixed with Fuscous; pairs of light
dorsal stripes grayish white and tinged with Buff; rump and thighs
Smoke Gray; dorsal surface of tail Fuscous Black mixed with
Cinnamon Buff; ventral surface of tail Sayal Brown or Clay Color,
Blackish Brown mixed with Cinnamon Buff around margins; antiplantar
and antipalmar surfaces of feet Pale Pinkish Buff; underparts
creamy white. _Skull_ and _Baculum_: Small but proportionally the
same as in other subspecies of _E. minimus_.

_Comparisons._--From _E. m. consobrinus_, the subspecies to the
west and south, _E. m. minimus_ differs in: Over-all tone of upper
parts lighter; underside of tail lighter.

From _E. m. pallidus_, the subspecies to the north and northeast,
_E. m. minimus_ differs in: Size smaller; skull shorter and
narrower; mandible shorter and shallower; baculum shorter; slightly
paler.

From _E. m. confinis_, the subspecies in the Big Horn Mountains,
_E. m. minimus_ differs in: Size smaller; skull shorter and
narrower; mandible shorter and shallower; baculum shorter; paler.

From _E. m. operarius_, the subspecies to the east and southeast,
_E. m. minimus_ differs in: Size smaller; skull shorter and
narrower; mandible shorter and shallower; baculum shorter; paler.

_Remarks._--_E. m. minimus_ is the smallest of the chipmunks that
occur in Wyoming. This pale little squirrel is found in the Red
Desert in Sweetwater County, where the features distinctive of the
subspecies are most strongly developed. Specimens from western
Sweetwater County and northwestern Uinta County are intergrades
between _E. m. minimus_ and _E. m. consobrinus_ and are referable
to _E. m. minimus_.

_Specimens examined._--Total number 167.

_Sublette Co._: 60 mi.