22 CHECK-LIST OF NORTH AMERICAN BIRDS. 



[B6 7 8, C 557, R 676, C 789.] 



GEOG. DIST. Arctic regions; south in autumn and winter to 

 Kamchatka, Point Barrow, Alaska, and Disco Bay, Greenland. 

 Casual in England, Faroes, Helgoland, etc. 



GENUS XEMA LEACH. 



Xema LEACH, Ross's Voy. App. 1819, p. Ivii. Type, Larus 

 sabinii SAB. 



62. Xema sabinii (SAB.). 



Sabine's Gull. 



Larus sabinii J. SAB. Trans. Linn. Soc. XII. 1818, 520, pi. 29. 

 Xema sabini LEACH, App. Ross's Voy. Baff. Bay. /j.to ed. 1819, 

 Ivii. 



[B 680, C 558, R 677, C 790.] 



GEOG. DIST. Arctic regions; in North America south in winter 

 to New York, the Great Lakes, and Great Salt Lake ; casual in 

 Kansas, Bahama, and on coast of Peru. 



SUBFAMILY STERNIN^!. TERNS. 

 GENUS G-ELOCHELIDON BREHM. 



Gelochelidon BREHM, Isis, 1830, 994. Type, G. meridionalis 

 BREHM = Sterna nilotica HASSELQ. 



63. Gelochelidon nilotica (HASSELQ.). 



Gull-billed Tern. 



Sterna nilotica HASSELQ. Reise nach Pal. Deutsche Ausg. 1762, 



325- 

 Gelochelidon nilotica STEJN. Auk, I. Oct. 1884, 366. 



[B 681, C 560, R 679, C 792.] 



GEOG. DIST. Nearly cosmopolitan ; in North America chiefly 

 along the Atlantic and Gulf coasts of the United States, breed- 

 ing north to southern New Jersey, and wandering casually to Long 

 Island and Massachusetts; in winter both coasts of Mexico and 

 Central America and south to Brazil. 



