1936] MAMMALS OF OREGON 131 



General habits. Hollister, who collected the type of this form and 

 wrote of its habits in the Siskiyou Mountains, says that these chip- 

 munks were common above 3,000 and 4,000 feet altitude, and most 

 abundant in the pine forests of the Canadian Zone near the summits 

 of the ridges. In the open rocky and chaparral-covered areas they 

 were wild and hard to collect, but in the forest areas they were 

 more numerous and easily secured for specimens. Sixty-nine, includ- 

 ing young of the year and adults, were taken in the Siskiyou Moun- 

 tains in September and October of 1909. Several of those taken 

 were infested by grubs, Cvterebra, and the scrotum and testes were 

 often completely destroyed by these parasites. 



In September, he says, they were feeding a great deal on the 

 little wild cherries (Prunus emwginata) and were often seen up 

 in the bushes gathering the red fruit. During October they were 

 feeding more on acorns and pine nuts and it was remarkable that 

 their cheek pouches would hold so much. One had its pouches full 

 of wild currant seeds, another was carrying 2 acorns, and another 

 5 acorns, in its pockets. Different individuals had 3, 5, 6, 17, and 

 19 seeds; of sugar pine, and others had 4, 5, 11, 23, and 65 seeds of 

 mountain pine in their pockets. 



EUTAMIAS TOWNSENDII SENEX (ALLEN) 

 ALLEN'S CHIPMUNK; WAS-LA of the Klamath (C. H. M.) 



Tamias senex Allen, Amer. Mus. Nat. Hist. Bull. 3 : 83, 1890. 



Type. Collected at Summit of Donner Pass, Placer County, Calif., by Lyman 

 Belding in 1885. 



General characters. Smallest of the subspecies of this group, tail less plumy, 

 colors palest, fur relatively harsh and thin in summer. Summer pelage, back 

 with 5 brown (rarely 1 or 3 blackish) stripes and 4 light gray stripes; sides 

 of head with 2 light gray and 3 brown stripes; sides rich rusty brown; feet 

 ochraceous; tail below light rusty brown, top and edges and tip black, frosted 

 with white-tipped hairs ; patch back of each ear light gray ; lower parts white 

 or creamy. Winter pelage clearer gray. 



Measurements. Average of several adults: Total length, 243 mm; tail, 103; 

 foot, 36; ear (dry), 17. One adult male collected by Joseph Grinnell measured 

 250; 110; 36; 16; and weighed 89.8 g; others weighed as high as 100, 108, 

 and 123 g, respectively. 



Distribution and habitat. In Oregon these chipmunks range from 

 Mill Creek and Warren Springs, east of Mount Jefferson southward, 

 keeping mainly east of the Cascades, and in the Paulina, Yamsey, 

 Klamath, and Warner Mountains (fig. 21). In California they in- 

 habit the Sierra Nevada and Cascades to the Yosemite ; also Warner 

 Mountains, Modoc County. They occupy Transition and Canadian 

 Zones in the drier, more open parts of the forests, especially the 

 yellow pine and lodgepole pine areas. 



General habits. These gray chipmunks are in habits as well as 

 general characters the farthest removed from typical tawnsendii of 

 any of the subspecies. Smaller, quicker, more dependent on escape 

 in open places, they are more like some of the other forms of moun- 

 tain chipmunks in general acivities. Still they have the shrill voice 

 and the lateral waving of the less plumy tail common to the town- 

 sendii group. Primarily forest dwellers and expert climbers, they 

 are often found running over logs or rocks or through dense tangles 

 of Ceanothus or shrubby oak chapparal, and their homes are usually 



