i. N Cebolleta,
1 (MM). _Socorro Co._: San Mateo Mountains, 1 (BS). _Chihuahua_:
Sierra Madre, near Guadalupe y Calvo, 3 (BS).

_E. d. utahensis_: Wyoming: _Sweetwater Co._: W side Green
River, 1 mi. N Utah Border, 1. Colorado: _Moffat Co._: Escalante
Hills, 20 mi. SE Ladore, 1 (BS). Arizona: _Coconino Co._: Ryan,
1 (BS).

#Eutamias merriami# (J. A. Allen)

Figure 7

General tone of upper parts grayish; cheeks and underparts
white, more or less dulled by gray; size large; skull large.

Baculum: Shaft thin; keel low, 2/5 of length of tip; tip 16 per cent of
length of shaft; angle formed by tip and shaft 130 deg.; distal 1/10 of
shaft slightly compressed laterally; base incised dorsally; shaft
markedly long, 4.88 mm.

Differs from _E. speciosus_, _E. panamintinus_, _E. umbrinus_, _E.
palmeri_, and _E. bulleri_, in base incised dorsally, base not widened,
shaft thinner, tip proportionally shorter; from _E. quadrivittatus_, _E.
ruficaudus_, _E. cinereicollis_, and _E. quadrimaculatus_, in base
incised dorsally, shaft thinner, tip proportionally much shorter.

For comparisons with _E. alpinus_, _E. minimus_, _E. townsendii_, _E.
sonomae_, _E. amoenus_, and _E. dorsalis_, see the accounts of those
species.

_Specimens examined_: One from Mount Pinos, Ventura Co.,
California (LA).

#Eutamias quadrivittatus# (Say)

Figures 8-10

Color bright and tawny; size medium to large; braincase widened.

Baculum of _E. q. quadrivittatus_: Shaft thick; keel proportionally low,
1/4 of length of tip; tip 30 to 44 per cent of length of shaft; angle
formed by tip and shaft 130 deg.; distal 1/3 of shaft slightly compressed
laterally; shaft long, 3.17 to 3.62 mm.

Differs from _E. q. hopiensis_, in baculum larger, angle formed by tip
and shaft less distinct; from _E. ruficaudus ruficaudus_, in shaft and
tip proportionally shorter; from _E. r. simulans_, in keel
proportionally lower, shaft usually shorter and narrower; from _E.
cinereicollis_, in shaft shorter, angle formed by tip and shaft larger,
ridges on either side of tip more distinct; from _E. quadrimaculatus_,
in tip proportionally shorter, shaft shorter; from _E. speciosus_, _E.
panamintinus_, _E. umbrinus_, _E. palmeri_, and _E. bulleri_, in base
not markedly widened, shaft longer, angle formed by tip and shaft
larger.

For comparisons with _E. alpinus_, _E. minimus_, _E. townsendii_, _E.
sonomae_, _E. amoenus_, _E. dor