"

Swarth (Univ. California Publ. Zool., 24:173, June 17, 1922) reported
that three specimens from Flood Glacier and 23 from Great Glacier,
British Columbia, and four from Sergief Island, at the mouth of the
Stikine River, Alaska, were: "All _E. wrangeli_, indistinguishable from
specimens at hand from Wrangell Island." Swarth further reported that,
although he found no intergradation between _Clethrionomys wrangeli_
from Flood Glacier and the nearly adjacent _Clethrionomys rutilus
dawsoni_, "the two species, however, resemble each other so closely in
form, and in some pelages in color also, that _wrangeli_ would seem to
be a coastal offshoot of _dawsoni_...."

Davis (The Recent Mammals of Idaho, The Caxton Printers, p. 306, April
5, 1939) and Orr (Jour. Mamm., 26:69, February 12, 1945) more recently
have shown that _Clethrionomys wrangeli_ is not a member of the
_rutilus_ group (to which _C. dawsoni_ belongs) but is a member of the
_gapperi_ group.

Our comparisons of a series of eight topotypes of _wrangeli_ (all in
the Biological Surveys Collection) with several subspecies of
_Clethrionomys gapperi_ (including _phaeus_, _saturatus_, _galei_,
_brevicaudus_, and others) reveal that the differences seen in
_wrangeli_ are of the kind and degree that serve to separate
subspecies. The red-backed mouse from Wrangell Island, then, should
stand as _Clethrionomys gapperi wrangeli_ (Bailey).

_Specimens examined._--Total, 31, distributed as follows: Alaska:
Wrangell, Wrangell Island, 27 (19 MVZ., 8 USBS); Sergief Island at
mouth of Stikine River, 4 (MVZ).

Clethrionomys gapperi solus, new subspecies

_Type._--Male, adult, skin and skull, No. 74939, Biological Surveys
Collection, United States National Museum; from Loring,
Revillagigedo Island, Alaska; obtained on September 22, 1895, by C.
P. Streator; original No. 4980.

_Range._--Known only from two localities on Revillagigedo Island,
Alaska.

_Diagnosis._--A short-tailed, dark-colored member of the _gapperi_
group. Dorsal stripe wide, between Chestnut and Bay (capitalized
color terms after Ridgway: Color Standards and Color Nomenclature.
Washington, D. C., 1912), with slight mixture of black-tipped
hairs; sides and venter heavily washed with Ochraceous-Tawny. Skull
flattened; rostrum proportionately short and wide; auditory bullae
relatively uninflated.

_Comparisons._--From topotypes of _Cle