270 NORTH AMERICAN FAUNA. [no. 27. 



found it common near Trout Rock, Northern Arm, July 25, and be- 

 tween there and Fort Rae, July 26, and I saw a pair on Lake Marian, 

 July 31. 



In 1904, J. W. Mills first observed this bird near Fort Providence. 

 May 9, and H. W. Jones collected two at the same place on May 20. 

 At Fort Simpson I first saw it May 12, and it was common on May 19, 

 when I took a specimen. On May 25 I observed about 25 individuals 

 on the river near the post. 



A female specimen, taken near Fort Providence, May 14, 1905, by 

 H. W. Jones, has recently been received. 



This bird apparently was first recorded from this region by Rich- 

 ardson, who, under the name Larus bonajparti, describes a male said 

 to have been killed on Great Slave Lake, May 26, 1826.° In his ac- 

 count of his third Arctic journey, he states that this bird breeds on 

 Bear Lake River, where it builds in colonies, sometimes placing 7 or 8 

 nests on a single tree. 6 The following year large flocks arrived at 

 Fort Franklin on May 18. c Kennicott mentions that one was shot by 

 W. L. Hardisty at Fort Resolution, May 18, 1860." Baird, Brewer, 

 and Ridgway state that specimens and eggs were procured at Fort 

 Resolution, Fort Rae, Big Island, Fort Simpson, Fort Good Hope, 

 Peel River, Fort Anderson, and on the lower Anderson River. c Mac- 

 Farlane records that 37 nests with eggs were found near Fort 

 Anderson, and on the lower Anderson River, all being built on trees/ 

 Hubert Darrell informs me that he observed small black-headed gulls, 

 probably referable -to this species, on Melville Sound, on the Arctic 

 coast, June 15, 1902. 



Rhodostethia rosea (Macgil.). Rosy Gull. 



Though occurring, sometimes abundantly, in the Arctic regions to 

 the eastward and westward, apparently the only record for the region 

 now under review is that of J. C. Ross, who states, under the name 

 Larus rossii, that it was reported once at Felix Harbor, Boothia." 



Although the rosy gull has been known for eighty years, its breed- 

 ing grounds remained undiscovered until 1905. In June of that year 

 the bird was found breeding commonly in the Kolyma Delta, eastern 

 Siberia, by S. A. Buturlin, who describes for the first time its breed- 

 ing habits, eggs, and young. 7 ' 



" Fauna F.oreali-Aruericana, II, p. 425, 1831. 



6 Arctic Searching Expedition, I, pp. 200, 201, 1851. 



c Ibid., II, p. 100, 1851. 



d Trans. Chicago Acad. Sci., I, p. 171, 1869. 



e Water Birds N. A., II, p. 263, 1884. 



t Froe. U. S. Nat. Mus., XIV, p. 418, 1891. 



s Appendix Ross's Second Voyage, p. xxxvi, 1835. 



* Ibis, 1906, pp. 131-139 ; 333-337. 



