rves
upward; pelage coarse; ears broad, rounded, of medium height.

_Geographic range._--Palearctic. West to Dvina and Kama rivers, Vologda,
and Kazan, in European Russia. South to southern Ural Mountains, Altai
Mountains; Kansu, Szechwan, Shensi, Shansi, and Chihli provinces of
China; Manchuria and Korea. East to Hokkaido Island, Japan; Kunashiri
Island, southern Kurile Islands; Sakhalin Island, and Yakutsk, Siberia.
North nearly to Arctic Coast in Siberia and European Russia (Ellerman
and Morrison-Scott 1951:503).

Subgenus #Neotamias# Howell

_Neotamias_ Howell, A. H., N. Amer. Fauna, 52:26, November 30, 1929.
Type, _Eutamias merriami_ J. A. Allen [=_Tamias asiaticus merriami_
J. A. Allen].

_Neotamias_, Ellerman, J. R., The families and genera of living rodents.
British Mus. (Nat. Hist.), 1:426, June 8, 1940.

_Neotamias_, Bryant, M. D., Amer. Midland Nat., 33:372, March, 1945.

_Diagnosis._--Size small to medium; lambdoidal crest barely discernible;
supraorbital notches even with, or posterior to, posterior notch of
zygomatic plate; baculum with distinct keel on dorsal surface of tip
which curves upward; pelage silky; ears long and pointed.

_Geographic range._--Western Nearctic. West to Pacific Coast. South
to Lat. 20 deg.30' in Baja California and to northwestern Durango and
southeastern Coahuila, Mexico. East to eastern New Mexico, westernmost
Oklahoma, eastern Colorado, Wyoming, northwestern Nebraska, western
and northwestern South Dakota, western and northwestern North Dakota,
northeastern Minnesota, northern Wisconsin and Upper Peninsula of
Michigan, and eastern Ontario. North to southwestern shore of Hudson
Bay, southern shore of Great Slave Lake and Yukon River, Yukon.

Genus #Tamias# Illiger

_Tamias_ Illiger, J. K. W., Prodromus Syst. Mam. Avium, pp. 83, 1811.
Type, _Sciurus striatus_ Linnaeus.

_Tamias_, 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. 33:372, March, 1945.

_Diagnosis._--Skull lightly built, narrow; postorbital process small
and weak; lacrimal not elongated; infraorbital foramen lacks canal,
relatively larger than in most sciurids; P3 absent; head of malleus
elongated; plane of manubrium of malleus forms 60 degree angle with
plane of lamina; hypohyal and ceratohyal bones of