widest point less
than .58 mm.; tip less than 35 per cent
of length of shaft.
_Eutamias ruficaudus ruficaudus_, p. 622

16'. Diameter of shaft at widest point more
than .65 mm.; tip more than 40 per cent
of length of shaft.
_Eutamias ruficaudus simulans_, p. 623

ACCOUNTS BY SPECIES

#Eutamias alpinus# (Merriam)

Figure 1

Pelage silky; tail bright orange beneath; markings relatively
obscure; size small; skull broad, flattened, and large in
proportion to body.

Baculum: Shaft thin; keel low, 1/7 of length of tip; tip 39 per cent of
length of shaft; angle formed by tip and shaft 135 deg.; distal 1/3 of
shaft slightly compressed laterally; base slightly wider than shaft;
shaft short, 2.17 mm.

Differs from _E. speciosus_, _E. panamintinus_, _E. umbrinus_, _E.
palmeri_, and _E. bulleri_, in base not markedly widened, and shaft
thinner; from _E. quadrivittatus_, _E. ruficaudus_, _E. cinereicollis_,
and _E. quadrimaculatus_, in shaft thinner, baculum shorter; from _E.
townsendii_, in base not dorsoventrally thickened, base not so widened;
from _E. sonomae_, in ridges on either side of tip not enlarged, base
not dorsoventrally thickened; from _E. amoenus_, _E. minimus_, and _E.
dorsalis_, in keel lower, angle formed by tip and shaft more distinct;
from _E. merriami_, in baculum markedly shorter, base not incised
dorsally.

_Specimen examined_: One from Big Cottonwood Meadows, S of Mount
Whitney, 10,000 ft., Inyo Co., California (CN).

#Eutamias minimus# (Bachman)

Figure 2

Coloration varying from light to dark depending on subspecies;
size small to medium; rostrum short and stout.

Baculum: Shaft thin; keel low, 1/5 of length of tip; tip 18 to 28 per
cent of length of shaft; angle formed by tip and shaft 125 deg.; distal
1/2 of shaft slightly compressed laterally; shaft short to long, 2.44 to
4.35 mm.

Differs from _E. speciosus_, _E. panamintinus_, _E. umbrinus_, _E.
palmeri_, and _E. bulleri_, in shaft thinner, base not markedly widened;
from _E. quadrivittatus_, _E. ruficaudus_, _E. cinereicollis_, and _E.
quadrimaculatus_, in shaft thinner, tip shorter; from _E. amoenus_, in
tip less than 28 per cent of length of shaft; from _E. dorsalis_, in
angle formed by tip and