quently more than a third of the
entire length of the animal."

The external and cranial measurements of two subadults in the United
States National Museum (No. 217413 from Quadra Lake and No. 217415 from
Marten Arm, Boca de Quadra, taken in mid-February) and three old adults
from Fort [= Port] Simpson, British Columbia (Nos. 90263-90264, 90272
USBS), are almost the same as those given by Swarth in the original
description of _Clethrionomys phaeus_.

In cranial measurements, as well as in the structure of the palate and
last upper molar, _C. phaeus_ agrees with the _gapperi_ group (to which
it has been assigned by Davis, The Recent Mammals of Idaho, The Caxton
Printers, p. 306, April 5, 1939, and by Orr, Jour. Mamm., 26:69,
February 12, 1945) and differs from _Clethrionomys occidentalis
caurinus_ (which was assigned above to the _occidentalis_ group,
formerly the _californicus_ group).

Since the measurements of specimens examined by us, as well as those
recorded by Swarth (_op. cit._), fall within the range of those of the
species _Clethrionomys gapperi_, and since the differences between
_phaeus_ and _C. g. saturatus_ are of the kind and degree that separate
subspecies in _C. gapperi_ we employ the name combination
_Clethrionomys gapperi phaeus_ (Swarth). _C. g. saturatus_, as
understood by us, occurs to the southeast of _C. g. phaeus_ in the
Rocky Mountains of British Columbia, and in northeastern Washington,
northern Idaho and northwestern Montana.

_Specimens examined._--Total, 23, distributed as follows: Alaska:
Chickamin River (Behm Canal), 15 (MVZ); Boca de Quadra, 3 (MVZ);
Marten Arm, Boca de Quadra, 1 (USNM); Quadra Lake, 1 (USNM).
British Columbia: Fort [= Port] Simpson, 3 (USBS).

Clethrionomys gapperi wrangeli (Bailey)

1897. _Evotomys wrangeli_ Bailey, Proc. Biol. Soc. Washington,
11:120, May 13, type from Wrangell, Wrangell Island, Alaska.

When Bailey (_loc. cit._) named the red-backed mouse from Wrangell
Island, Alaska, he characterized it as "A large, dull-colored species
entirely distinct from any known form," and remarked: "In no way does
_E._ [= _Clethrionomys_] _wrangeli_ show a close relationship to any
other American species. In size and relative proportions it comes
closest to _E. dawsoni_, from which it differs widely in coloration and
more widely in cranial characters. With the long-tailed species south
and east of its range there is no need of comparison.