92 CHECK-LIST OF NORTH AMERICAN BIRDS. 



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



HAB. Arctic regions ; in North America south in winter to New 

 York, the Great Lakes, and Great Salt Lake ; casual south to Peru. 



SUBFAMILY STERNIN^. TERNS. 



GENUS GELOCHELIDON BREHM. 



Gelochelidon BREHM, Naturg. Vog. Deutschl. 1831, 774. 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.] 



HAB. Nearly cosmopolitan ; in North America chiefly along the 

 Atlantic and Gulf coasts of the United States. 



GENUS STERNA LINNAEUS. 



SUBGENUS THALASSEUS BOIE. 



Thalasscus BOIE, I sis, 1822, 563. Type, Sterna caspia PALL. = S. 

 tschegrava LEPECH. 



64. Sterna tschegrava LEPECH. 



Caspian Terii. 



Sterna tschegrava LEPECH. Nov. Comm. Petrop. XIV. 1770, 500, 

 pi. 13, fig. 2. 



[B 682, C 561, R 680, C 793.] 



HAB. Nearly cosmopolitan ; in North America breeding southward 

 to Virginia, Lake Michigan, Texas, Nevada, and California. 



SUBGENUS ACTOCHELIDON KAUP. 



Actochelidon KAUP, Sk. Ent. Eur. Thierw. 1829, 31. Type, Sterna 

 cantiaca GMEL. = S. sandvicensis GMEL. 



