122 University of California Publications in Zoology. ["Vol. 7 



first time that a flying squirrel has been reported from any 

 island locality in Alaska, but it is such an absolute accident to 

 run across them during the summer months in this region that 

 they might well occur in comparative abundance and still be 

 overlooked. I should consider it very possible that they might yet 

 be found on such islands as Revillagigedo, Wrangell, Mitkof, or 

 the Kake islands. They occur all along the mainland coast, where 

 the Indians told us that they frequently catch them in winter in 

 their marten traps, though they seldom see them in summer. 



The one secured on Btolin Island entered the cabin I was 

 occupying, and foraged in my boxes of provisions for several 

 nights before it was caught in a rat trap. The Bradfield Canal 

 specimen was taken in a rat trap set on the roof of an old Indian 

 cabin at the edge of the woods. They are both old females which 

 had apparently recently reared litters of young. 



In coloration they are precisely alike, being, perhaps, a 

 shade darker and richer brown than four specimens in the 

 Museum collection (topotypes of 8. a. zaphaeus) taken at Helm 

 Bay, Cleveland Peninsula, in September. 



Castor canadensis leucodontus Gray. Pacific Beaver. 



Beaver sign, mostly quite cold, was found at many scattered 

 localities, enough to indicate the former wide-spread distribution 

 of the species over the larger islands of the group, and on the 

 mainland. Incessant trapping has reduced their numbers to 

 such an extent, however, that-it is only in an occasional obscure 

 locality that a few individuals still survive, usually living in 

 the banks of a river, near the head of the stream. On Kupreanof 

 Island fresh sign was seen some ten or twelve miles up the stream 

 on which we were camped, but a party of Indians was trap- 

 ping in the locality at the time. At Three-mile Arm, Kuiu Island, 

 Hasselborg found some old dams at the head of the creek, but 

 the beaver had apparently been gone several years at least, and 

 the Indians trapping in the vicinity had caught none during the 

 winter. On Prince of Wales Island old dams were seen at Port 

 Protection, abandoned for many years, while at Klawak Salt 

 Lake an Indian told us he had caught several during the winter. 

 Hasselborg found indications of the presence of a few "bank 



