64 University of Calif ornia Publications in Zoology [Vol.30 



Bonaparte gulls were seen on all the small lakes of the region, and 

 may have been nesting in such places, too, though we had no positive 

 evidence to this effect. The species apparently left early in August ; 

 none was seen after the first week of this month. 



One specimen was collected (no. 44630), a young bird, taken 

 July 14, molting from the down to first winter plumage, and not yet 

 able to fly. 



Sterna paradisaea Briinnich. Arctic Tern 

 Seen at Carcross, May 22, on Tagish Lake May 27, and at Atlin 

 upon our arrival the next day. Nesting in some numbers (ten or 

 twelve pairs at least) on the islands opposite Atlin, and certainly at 

 other nearby points also, for the birds were seen constantly along the 

 shore of Atlin Lake and about some of the smaller lakes. On the 

 islands mentioned, none of the young survived the onslaughts of the 

 herring gulls. 



The species was last seen August 8. One specimen was collected 

 (no. 44631), a young bird taken July 14, molting from the down to 

 first winter plumage. 



Mergus americanus Cassin. American Merganser 

 A single male bird was seen at Carcross on May 24. The species 

 was not otherwise observed during the summer. 



Mergus serrator Linnaeus. Red-breasted Merganser 

 Apparently rare. An adult male was seen on Atlin Lake, June 6. 

 Several were seen on Surprise Lake, September 15, and one collected 

 (no. 44632), a young bird, fully feathered as regards body plumage 

 but not yet able to fly. 



Lophodytes cucuUatus (Linnaeus). Hooded Merganser 

 An adult male, a single bird, seen on a pond near Atlin on June 17, 

 and watched through binoculars for some time. This is perhaps the 

 most northwestern point of record for the species. Great Slave Lake, 

 its northernmost limit in the interior, is but a little farther north 

 than Atlin. 



Anas platyrhynchos Linnaeus. Mallard 

 Seen at Carcross, May 22. There were probably a few scattered 

 pairs breeding in the marshes about Atlin, but not many. Only an 



