_Eutamias_ Trouessart, E. L. Catal. Mamm. viv. et foss., Rodentia,
in Bull. Soc. d'Etudes Sci. d'Angers, 10:86-87, 1880. Type
_Sciurus striatus asiaticus_ Gmelin.
_Eutamias_, Merriam, C. H., Proc. Biol. Soc. Washington,
11:189-190, July 1, 1897.
_Eutamias_, Howell, A. H., N. Amer. Fauna, 52:26, November 30, 1929.
_Tamias_, Ellerman, J. R., The families and genera of living rodents.
British Mus. (Nat. Hist.), 1:426, June 8, 1940.
_Tamias_, Bryant, M. D., Amer. Midland Nat., 33:732, March 1945.
_Diagnosis._--Skull lightly built, narrow; postorbital process light
and weak; lacrimal not elongated; infraorbital foramen lacks canal,
relatively larger than in most sciurids; P3 present; head of malleus not
elongated; plane of manubrium of malleus 90 degrees to plane of lamina;
hypohyal and ceratohyal bones of hyoid apparatus fused in adults;
conjoining tendon between anterior and posterior sets of digastric
muscles ribbonlike; keel on dorsal side of tip of baculum; tail more
than 40 per cent of total length; five longitudinal dark stripes evenly
spaced and subequal in width; two lateral dark stripes short.