346 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
indistinguishable from typical townsendit. Another from Bear Valley, 
San Benito County, to the south of that place, is nearly as dark, yet a 
shade paler. Through the kindness of Dr. Joseph Grinnell and Mr. 
H. S. Swarth of the University of California, I have had for examina- 
tion a very interesting series of nine skins from Auburn, Placer County, 
north central California, at the semi-arid western foot of the Sierra 
Nevada. Two of these are in dark immature pelage. Two others 
(7755, 19214) agree perfectly with specimens of pallescens from 
Arizona or Wyoming, though the bases of the hairs are a trifle darker 
than the average of that subspecies. Four, though of a richer brown 
than pallescens are yet not quite so dark as typical townsendi of the — 
humid coastal area. Nevertheless they are nearer to the latter than to 
pallescens. The remaining specimen is indistinguishable in any essen- 
tial particular from townsendii of the Oregon coast. This last example 
served as the type of C. macrotis intermedius Hilda W. Grinnell. 
With the advantage of more abundant material and after careful 
consideration, I feel unable to concur with Mrs. Grinnell in regarding 
these specimens as representing a recognizable race. They are clearly 
intermediate between pallescens and townsendii; the type can be 
absolutely matched by Oregon specimens of the latter, while others 
again, from the same locality, might without violence be referred 
to the former. In other words, a series of topotypes shows no char- 
acters by which they may constantly be distinguished from the two 
neighboring races over any considerable area. The same series was 
originally referred to townsendii by Dr. Joseph Grinnell, and the 
specimens are on the whole best considered as representatives of that 
subspecies, with a tendency toward the pallid form of the interior. 
The same is true of specimens from Happy Camp (Siskiyou Co.) 
and Bear Valley (San Benito Co.), referred by Mrs. Grinnell to 
‘intermedius.’ A single skin (6957 Univ. of Cal., Mus. Vert. Zool.) 
from Johnson’s Harbor, Santa Catalina Island, California, though 
much too dark to be typical of pallescens is not so dark as typical 
townsendii. Though an intermediate specimen in color, it may 
for the present be considered nearer the latter. The record is of 
interest in connection with the occurrence of other small land mam-_ 
mals on this island, some of them distinct insular representatives of 
continental species. 
Specimens examined.— Including intermediate specimens, which are 
nearer townsendii than pallescens, twenty-three from the following 
localities: 
British Columbia: Comox, | (Biol. Surv.). 
