ORDER CHARADRIIFORMES. 137 



Rhodostethia rosea (Macgillivray). Ross's Gull. [61.] 



Larus roseus Macgillivray, Mem. Wernerian Soc, V, 1824, 249. (Ig- 

 loolik, Melville Peninsula, ex Richardson.) 



Range. — Arctic regions; erratic and irregular. Breeds in the delta of 

 Kolyma River, northeastern Siberia, and Indigirka River, from its mouth to 

 300 miles inland. Recorded in summer from Spitzbergen, Franz Josef Land, 

 Bennett and Wrangel islands, Siberia, and Melville Peninsula. Migrates to 

 Kamchatka, the Arctic coast of Alaska, and the west coast of Greenland. 

 Accidental in England, the Faroe Islands, Heligoland, France, and Italy. 



Genus XEMA Leach. 



Xema Leach, in Ross, Voyage Discovery, 1819, App., Ivii. Type, by 

 monotypy, Larus sabini Sabine. 



Xema sabini (Sabine). Sabine's Gull. [62.] 



Larus sabini J. Sabine, Trans. Linn. Soc. Lond., XII, Pt. ii, 1819, 522 (pi. 

 29). (Sabine Islands near Melville Bay, west coast of Greenland, lat. 

 75° 29', long. 60^ 9'.) 



Range. — Breeds on the coast of Alaska from Kuskokwim River to Norton 

 Sound, in northern Mackenzie, south Victor, Southampton, and southwestern 

 Baffin islands to northern Ellesmere Island and northern Greenland, and on 

 Arctic islands and coasts of Europe and Asia (Taimyr Peninsula and Spitz- 

 bergen). Winters on the coast of Peru and migrates along the Pacific coasts 

 of British Columbia and California, the main flight apparently some miles 

 from shore. Casual on the Atlantic coast and in the interior (Labrador, 

 Quebec, Maine, Massachusetts, Illinois, Missouri, Kansas, Montana, British 

 Columbia, Saskatchewan, New York, Ohio, Iowa, Nebraska, and Utah); 

 accidental in Bermuda, Switzerland, Hungary, the British Isles, and France. 



Subfamily STERNINAE. Terns. 



Genus GELOCHELIDON Brehm. 



Gelochelidon C. L. Brehm, Isis von Oken, XXIII, 1830, Heft x (Oct.), col. 

 994. Type, by monotj'py, Lachseeschwalbe, Gelochelidon mcridionalis 

 Brehm = Steriia nilotica Gmelin. 



Gelochelidon nilotica aranea (Wilson). Gull-billed Tern. [63.] 



Sterna aranea Wilson, Amer. Orn., VIII, 1814, 143 (pi. 72, fig. 6). (Cape 

 May, New Jersey.) 



Range. — -Breeds on the Atlantic coast from Virginia (formerly New Jersey) 

 to Georgia and on the Gulf coast from Mississippi to Texas; also in the Ba- 

 hamas, Cuba, and at the mouth of the Amazon; a breeding colony recently 



