pe 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 ea