1916] Kellogg: Mammals and Birds of Northern California 375 



This squirrel was found most abundant on Saloon Creek divide, 

 where it was the predominating species of mammal, as also at the 

 head of Bear Creek, eleven specimens being taken at each of these 

 localities. Its occurrence at Kangaroo Creek must have been at 

 about the lowest limit of its range. Fifty-four specimens were 

 taken (nos. 13029-130S2), from the following localities: Jackson 

 Lake, Wildcat Peak, North Fork of Coffee Creek, Saloon Creek divide, 

 South Fork of Salmon River, head of Grizzly Creek, head of Rush 

 Creek, Kangaroo Creek, head of Bear Creek, and Castle Lake. 



Sciurus douglasii albolimbatus Allen 

 Sierra Chickaree 

 Twenty-one specimens were taken (nos. 12738-12740, 13280- 

 13298) representing five localities: Helena, Jackson Lake, head of 

 Rush Creek, Bear Creek, and Castle Lake. This shows quite a 

 range of zone from the Transition of Helena to the Boreal of Jack- 

 son Lake. Those from Bear Creek and Castle Lake, taken in 

 August, show the light ochraceous-buff beneath, of the summer 

 pelage. 



Sciurus griseus griseus Ord 

 California Gray Squirrel 

 Helena, Trinity County, was the only locality at which we 

 found gray squirrels, and because of the cold weather there in 

 February they were not particularly in evidence. The seven speci- 

 mens taken (nos. 12731-12737) bear dates from February 13 to 17. 



Glaucomys sabrinus flaviventris Howell 

 Trinity Flying Squirrel 



We secured our first flying squirrel at Jackson Lake in a rat- 

 trap baited with oatmeal and set near the head of our bed. For 

 two nights some creature had startled us by running across our 

 faces. When we found what the intruder was, we looked carefully 

 in all the adjacent red firs for some trace of a nest; but our knowl- 

 edge of the home and habits of Glaucomys received no increment by 

 actual observation during our entire trip. 



Only three specimens were taken at Jackson Lake, where it may 

 have been too early in the season for them to be out in numbers. 



