1916] Kellogg: Mammals and Birds of Northern California 373 



made them seem a little more desirable; for here they were ap- 

 parently above the Limit of their usual range and were found both 

 on the dry rocky hillside above the lake and in damper ground 

 where the creek came out from the lake; altitude 5434 feet. I 

 presume that until the timber between Sisson and Castle Lake was 

 cut out the ground squirrels were probably not found there. They 

 doubtless followed the steadily retreating timber-line which re- 

 sulted in unnatural conditions of dryness for such an altitude. 

 The specimens taken at Castle Lake were in the process of molt 

 into fresh fall pelage. 



Eleven specimens were taken (nos. 13018-13028), from May ten, 

 Scott River, Summerville. six miles northwest of Callahan, and 

 Castle Lake. 



Eutamias amoenus amoenus (Allen) 

 Klamath Chipmunk 

 This small chipmunk was encountered at every camp. Its 

 greatest abundance was at Jackson Lake and on Rush and Bear 

 creeks. Here the timber conditions seemed to be just right for 

 them, and when other material was scarce we could always depend 

 upon the chipmunk. Ninety-six specimens were obtained (nos. 13083- 

 13177, 13280), from the following localities: Scott River, Jackson 

 Lake, Wildcat Peak, Salmon Creek divide, South Fork of Salmon 

 River, head of Grizzly Creek, head of Rush Creek, head of Bear 

 Creek, head of Deadfall Creek, < 'astle Lake. 



Eutamias senex (Allen) 

 Allen Chipmunk 



We found this larger chipmunk along with the smaller one at 

 every camp, and collected a good-sized series, the bulk of it coming 

 in at Jackson Lake, Bear Creek and Castle Lake. Our specimens 

 differ somewhat from the description of senex in having the tail, 

 below, cinnamon rufous, instead of orange ; in this respect they 

 incline toward E. quadrimaculatus, a form of a lower zone. But 

 their measurements and coloration otherwise identify them unques- 

 tionably as senex. 



One hundred and two specimens were obtained (nos. 13178-13279), 

 from the following localities: Scott River, Jackson Lake, Wildcat 

 Peak, North Fork of Coffee Creek, South Fork of Salmon River, 



