"^^"4^] THAYER AND BANGS — BIRDS 9 



this same place, both young and adults evidently having left by 

 that date. At Cape Irkaipij, September 6, 1911, a few birds were 

 observed still feeding their young on the bluffs. One specimen was 

 preserved. 



Cepphus columba Pallas. 



Not observed west of Koliutschin Bay. One adult male was 

 taken at Diomede Island, June 4, 1913. 



Uria lomvia arra Pallas. 



Pallas's murre bred on Koliutschin Island in considerable num- 

 bers, but was not seen west of that point. No specimens were 

 saved. 



Laridae. 



Rissa tridactyla pollicaris Ridg. 



The westernmost rookery of the Pacific kittiwake appears to be 

 Koliutschin Island. A large number of birds were still on the 

 breeding grounds here as late as September 22, 1912. Farther 

 west the species was not observed breeding. Mr. Koren, however, 

 asserts in his notes that at Chaun Bay he shot this subspecies and 

 examples of the common kittiwake (Rissa tridactyla tridactyla 

 (Linn.)), the two forms being together and about equally common. 

 He of course knows the birds, but he certainly should have saved 

 specimens; without them we can give this interesting record only 

 for what it is worth. 



Pagophila alba (Gunnerus). 



While crossing Bering Strait in a whale boat, November 9, 1912, 

 Mr. Koren saw a few ivory gulls between East Cape and the 

 Diomede Islands. 



