HOWELL — SEVEN NEW CHIPMUNKS 
181 
Mountains, California (altitude 6,000 feet); collected September 16, 1909, by 
N. Hollister; original number 3432. 
Subspecific characters. — Nearest to Eutamias townsendii senex, from which it 
differs in darker coloration of the upperparts and sides, the rump and thighs 
especially being much more brownish (less grayish). Compared with ochrogenys: 
Coloration much more grayish (less brownish) ; light dorsal stripes grayish white 
instead of tawny-olive; sides of head and face much less ochraceous; underparts 
more whitish and only faintly washed with pinkish buff; tail paler beneath; skull 
similar to that of ochrogenys, but averaging smaller. 
Measurements of type. — Total length, 268; tail vertebrae, 104; hind foot, 36.5; 
ear from notch, 15.5. Skull: Greatest length, 38.5; zygomatic breadth, 21.4; 
mastoidal breadth, 16.4; interorbital breadth, 8.2; length of nasals, 12.3. 
Eemarks .—The Siskiyou chipmunk occupies the Siskiyou Mountain region of 
northern California and southern Oregon, ranging north to the upper Rogue River 
Valley, Oregon. It is, of course, intermediate in characters between senex and 
ochrogenys, but has well defined characters distinguishing it from either and 
occupies an area of considerable breadth. 
Eutamias townsendii alleni^ subsp. nov. 
MARIN CHIPMUNK 
Tamias townsendii hindsii Allen, Bull. Amer. Mus. Nat. Hist., vol. 3, p. 75, 
1890, and of recent authors generally (not Tamias hindsii Gray). 
Type specimen. — ’No. 135,177, U. S. Nat. Mus. (Biological Survey collection); 
male adult, skin and skull; from Inverness, Marin County, California; col- 
lected November 16, 1904, by N. Hollister; original number, 1378. 
Geographic distribution.— Coast region of Marin County, California, from 
Point Reyes east to Mount Tamalpais.^ 
Subspecific characters. — Similar to E. townsendii sonomoe but slightly smaller ,- 
head and upperparts distinctly darker in both pelages; outer pair of light dorsal 
stripes usually strongly washed with buff; underparts averaging more buffy 
(less whitish); hind feet darker; tail averaging darker beneath; skull similar to 
that of sonomoe but averaging smaller. Compared with E. townsendii ochrogenys: 
Size much smaller; upperparts much brighter tawny (less olivaceous), especially 
in winter pelage; dorsal stripes more distinct, the dark stripes much more black- 
ish, the light stripes more buffy; sides of face less extensively washed with 
ochraceous. 
Measurements of type. — Total length, 231; tail vertebrae, 105; hind foot, 37; 
ear from notch, 16. Skull: Greatest length, 36.8; zygomatic breadth, 19.6; 
mastoidal breadth, 15.1; interorbital breadth, 7.8; length of nasals, 10.5. 
Remarks. — ‘This is a renaming of the form currently known as Eutamias hindsii, 
which name now proves to be a pure synonym of E. townsendii townsendii. 
Inquiry of Mr. Oldfield Thomas regarding the type specimen of Tamias hindsii 
developed the fact that it is in the British Museum (No. 42.10.30.10). On the 
2 Named for the late Doctor J. A. Allen, the first reviser of the chipmunks 
of this genus. 
2 Cf. Grinnell, J., Univ. Calif. Pub. Zook, vol. 12, p. 324, 1915. 
