ange (those from the Blue Mountain area excepted)
discloses that the skulls do not differ essentially from those of
topotypes of _M. l. mordax_, but do differ, as outlined above, from
near-topotypes of _M. l. halli_. There is considerable variation in
color among the Washington-taken specimens of _Microtus longicaudus_.
Animals from the eastern flanks of the Cascades average darker than
those taken, north of the Snake River, still farther east in
Washington. Possibly Dalquest (_op. cit._) relied mainly upon this
darker color in assigning the specimens from eastern Washington to _M.
l. halli_. Relying principally upon cranial characters, we conclude
that most of the specimens are better referred to _M. l. mordax_ and
that _M. l. halli_ is restricted, in Washington, to the Blue Mountains.

_Specimens examined of Microtus longicaudus mordax._--Total, 74,
all in the Biological Surveys Collection, distributed as follows:
Washington: _Okanogan_ _County_: mouth of Holmar Creek, W Fork
Paysaten River, 4700 ft., 1; Conconully, 3; Twisp, 1; Omak Lake,
1200 ft., 3. _Stevens County_: 5 mi. N Colville, 1. _Pend Oreille
County_: 9 mi. N Metalina, 2600 ft., 1; Sullivan Lake, 3000 ft., 3.
_Chelan County_: Sethekin, 1079 ft., 3; head of Lake Chelan, 900
ft., 12; Hart Lake, Railroad Creek, 3900 ft., 1; Entiat, 20 mi from
mouth of Entiat River, 1680 ft., 13; Wenatchee, 4. _Douglas
County_: Waterville, 1. _Jefferson County_: Cleveland, 2. _Kittitas
County_: 2 mi. S Blewett Pass, 3000 ft., 6: Ellensburg, 1500 ft.,
4. _Whitman County_: Colfax, 2. _Yakima County_: McAllister
Meadows, Tieton River, 3000 ft., 3; Gotchen Cr., 5500 ft., near
Sava Spring, Mt. Adams, 2. _Klickitat County_: 8 mi. S Glenwood,
base Mt. Adams, 2. _Asotin County_: Anatone, 3300 ft., 4; Bly, 1000
ft., 2.

Microtus miurus muriei (Nelson)

1931. _Microtus muriei_ Nelson, Jour. Mamm., 12:311, August 24,
type from Kutuk River (tributary of Alatna River), Endicott Mts.,
Alaska.

Rausch (Jour. Washington Acad. Sci., 40:135, April 21, 1950) proposed
the name _Microtus miurus paneaki_, with type locality at Tolugak Lake
(lat. 68 deg. 24' N, long. 152 deg. 10' W), Brooks Range, Alaska, for a
meadow mouse of the subgenus _Stenocranius_. This place is only
approximately forty miles east and north of the type locality of the
earlier named _Microtus muriei_, also a member of the subgenus
_Stenocran