9* 



CHECK-LIST OF NORTH AMERICAN BIRDS. 



[B 680, €558, R ^,77, 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-<E. Terns. 



Genus GELOCHELIDON Brehm. 



GelochelidoH Brehm, Naturg. Vog. Deutschl. 1831, 774. Type, G. 

 7neridionalis Brehm = Sterna nilotica Hasselq. 



63. Oelochelidon nilotica (Hasselq.). 



Gull-billed Tern. 



Sterna nilotua Hasselq. Raise nach Pal. Deutsche Ausg. 1762, 325. 

 Oelochelidon nilotica Stejn. Auk, I. Oct, 1884, 3^6. 



[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 Linn/eus. 



Subgenus THALASSEUS Boie. 



Thalasseus Boie, Isis, 1822, 563. Type, Sterna caspia Pall. 

 tschegrava Lepech. 



= S. 



64. Sterna tschegrava Lepech. 



Caspian Tern. 



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. 



