General tone of upper parts dark grayish tawny; size medium to
large; skull large; braincase widened.
Baculum: Shaft thick; keel proportionally low, 1/5 of length of tip; tip
34 per cent of length of shaft; angle formed by tip and shaft 145 deg.;
distal 1/3 of shaft slightly compressed laterally; base slightly
widened; shaft long, 4.88 mm.
Differs from _E. quadrimaculatus_, in keel lower, ridges on either side
of tip weakly developed, angle formed by tip and shaft larger; from _E.
speciosus_, _E. panamintinus_, _E. umbrinus_, _E. palmeri_, and _E.
bulleri_, in shaft longer, base not markedly widened, angle formed by
tip and shaft much larger.
For comparisons with _E. alpinus_, _E. minimus_, _E. townsendii_, _E.
sonomae_, _E. amoenus_, _E. dorsalis_, _E. merriami_, _E.
quadrivittatus_, and _E. ruficaudus_, see the accounts of those species.
_Specimen examined_: One from Mount Thomas, White Mountains,
Apache Co., Arizona (BS).
#Eutamias quadrimaculatus# (Gray)