1926] Swarth: Birds and Mammals from the Atlin Region 149 



Eutamias minimus caniceps Osgood. Gray-headed Chipmunk 

 Nine specimens collected (nos. 34410-34418), all adult. Chipmunks 

 were seen about Carcross, and they were fairly common in the lowlands 

 of the Atlin region. In the town they came familiarly about barns and 

 in the gardens. 



Sciurus hudsonicus hudsonicus (Erxleben) 

 Northern Eed Squirrel 

 Six specimens collected (nos. 34404-34409), all adults that are 

 entirely or mostly in summer pelage. In this small series there is 

 rather notable variation from grayish to reddish extremes ; the reddish 

 specimens may be taken to illustrate intergradation by individual 

 variation toward 8. h. petidans of the nearby Alaskan coast. 



Red squirrels are fairly common and of general distribution 

 throughout the Avooded parts of the region. 



Castor canadensis canadensis Kuhl. Beaver 



B,eaver have little chance of survival £tnywhere near human habita- 

 tions unless accorded rigid protection, and throughout such parts 

 of the Atlin region as we visited trapping had reduced their num- 

 bers to the vanishing point. On the evening of September 9 I spent 

 an hour or more watching a pair/ of beavers in a pond a few miles 

 north of the British Columbia- Yukon boundary, on the trail to Lake 

 Teslin. They were then actively engaged in laying away winter stores, 

 in the shape of willow cuttings, and trip after trip, with monotonous 

 regularity, was made by the laboring animals, across the pond to the 

 growing willows, and back to the house again, where entrance was 

 effected? by diving. 



Peromyscus maniculatus borealis Mearns 

 Northern White-footed Mouse 

 Thirteen specimens were collected (nos. 34419-34431), twelve from 

 the vicinity of Atlin, and one from lower Otter Creek. White-footed 

 mice were about as scarce as the other small rodents of the region, and 

 even this small series was acquired, usually one specimen at a time, at 

 long intervals througjt the summer. 



