The Chipmunks of the Genus Eutamlas. li)*> 



Jail not exceedingly long. 



Upper parts with at least 3 dorsal stripes distincthj black. 



Ground color of upper parts (including flanks and 

 inner pair of light stripes) uniform dull yellowish ful- 

 vous from neck to tail ; outer pair of light stripes 

 slightly yellower and very hroad ; external lateral 

 dark stripe showing hlack (making 5 stripes showing 

 black) ; ear stripes and post-auricular spots sharply 

 defined and very conspicuous townsendi. 



Ground color of upper parts not uniform ; flanks and 

 fore part of back rich ferruginous ; outer pair of light 

 stripes whitish, more or less washed with fulvous, 

 and nari-ow ; external lateral stripe rusty ; ear stripe 

 and post-auricular spots only moderately defined. . .hindsi. 

 Upper parts with only one dorsal stripe {tlie median) distinctly 

 black. 



Top of head and rump grizzled gray ; outer pair of light 

 stripes whitish ; inner pair grizzled gray ; under part^ 

 leliite ; under side of tail dull ful>:ou,s senex. 



Top of head and rump grizzled fulvous or golden-ful- 

 vous; outer pair of light stripes grizzled grayish, 

 inner piair yellowish-fulvous; under parts strongly suf- 

 fused ivith sabnonfulvous ; undei" side of tail deep rich 

 chestnut ochrogenys. 



5. Remarks on the speciosus Group. 



The sj)eciosus group is of hardl}' less interest than the townsendi 

 group, from which it differs totally in ap{>earance. The mem- 

 bers of the towiisendl series are large and dark, with relatively 

 dull stripes ; those of the speciosus series are decidedly smaller 

 and lighter, with very bright stripes. Most members of the Unvn- 

 seadi group have become differentiated into full species, while 

 those of the speciosus grouj) (except j^ulmeri, which is separately 

 described) are still only subspecies. The townsendi group, as 

 already shown, has both Boreal and Transition representatives ; 

 those of the speciosus group are purely Boreal, inhabiting the 

 Hudsonian and Canadian zones from timber-line down to the 

 lower limit of spruce and firs. Their distribution therefore is 

 not continuous, but takes the form of isolated colonies occupj''- 

 ing the summits of the higher mountains from San Jacinto Peak, 

 in southern California, northward to the neighborhood of Donner, 

 a little north of Lake Tahoe. The exact northern limit is un- 

 known, but the group does not reach the mountains of northern 

 California. The mountains on which members of the group are 



