Pelage tawny to olivaceous; stripes obscure and underparts
tawny, or stripes conspicuous and underparts white; tail slender
and sparsely haired; size large; skull largest in the subgenus
_Neotamias_.
Baculum: Shaft thin; keel low, 1/5 of length of tip; tip 32 per cent of
length of shaft; angle formed by tip and shaft 130 deg.; distal 1/5 of
shaft slightly compressed laterally; base deeper and wider than shaft;
shaft short, 2.24 mm.
Differs from _E. speciosus_, _E. panamintinus_, _E. umbrinus_, _E.
palmeri_, and _E. bulleri_, in base not markedly widened, shaft thinner,
tip proportionally shorter; from _E. quadrivittatus_, _E. ruficaudus_,
_E. cinereicollis_, and _E. quadrimaculatus_, in shaft thinner, baculum
shorter and smaller; from _E. sonomae_, in ridges on either side of tip
not enlarged, keel proportionally higher; from _E. amoenus_ and _E.
dorsalis_, in base widened and thickened, baculum usually shorter; from
_E. merriami_, in being markedly shorter, and having base widened and
deepened but not incised dorsally.
For comparisons with _E. alpinus_ and _E. minimus_ see the accounts of
those species.
_Specimens examined_: 2.
_E. townsendii townsendii_: Oregon: _Multnomah Co._: Portland, 1
(NM).
_E. t. cooperi_: Oregon: _Hood Co._: Brooks Meadow, 4,300 ft., 9
mi. ENE Mount Hood, 1.
#Eutamias sonomae# Grinnell