VOL. IV.] Notes on a Collection of Mammals. 319 



were the only ones secured. They were taken at a little over 

 7500 feet elevation, among bushes and granite boulders along 

 the western slope of Mt. Tallac. I do not remember seeing any 

 at Summit Station, the type locality of the species, but several 

 large gray chipmunks were seen at the foot of Donner Pass, 

 along the western end of Donner Lake. Their size was notice- 

 ably greater than that of the smaller chipmunks, amoenus and 

 frater, which I had been collecting on the summit. 



Of three specimens two are adult females collected August 4 

 and 12, apparently just beginning to moult. The other, taken 

 August 12, is a young male, nearly full grown and somewhat 

 richer in coloration. 



4. Taniias ajjicenus Allen. Klamath Chipmunk. 



Of the seven specimens of Tamias referable to this species, 

 three were taken at Summit Station and four on Mt. Tallac. 

 They are mostly in ragged pelage, and some seem to approach 

 Tamias frater, though in all the specimens the pale buff base of 

 the hairs on the upper surface of the tail is enough to distinguish 

 them easily. 



This is the smallest species of Taniias collected in the Sierra 

 Nevada; two specimens, No. 58 s , and No. 62 $ , were collected 

 on bare rocks on Mt. Tallac, at 9500 feet elevation. It was 

 found on trees, on the ground, and among rocks. Numerous 

 small chipmunks were seen on a rocky, scantily-wooded hillside 

 some miles west of Summit Station and at about 1000 

 feet lower altitude, but as no specimens were taken, they might 

 have been either amoenus ox frater. 



5. Tamias frater Allen. Sierra Nevada Chipmunk. 



Seven specimens of this form were taken, five at Summit 

 Station and two on Mt. Tallac. These, like most of the other 

 chipmunks collected in the Sierra Nevada, are in transitional 

 pelage and consequently very difl&cult to determine. Some 

 approach exceedingly close to Taniias quadrimaculatus in color- 

 ation. The habits of this species appeared similar to those of 

 T. amoenus. 



6. Taniias minimus pictus h\\^n. Desert Chipmunk. 



This species was found only in the Carson Valley, Nevada. 

 It was common in the sage brush, sometimes a long distance away 



