AVES LARID^E. 1 93 



of S. forsteri, taken on the Gulf coast of Florida in November and De- 

 cember, 1879, and January, 1880, which form a part of the large series of 

 these birds in the Princeton University collection. This entire series of 

 winter examples of Sterna forsteri bear out the generalization just set 

 forth. Moreover, the individual variation is not great. 



Subfamily RHYNCHOPIN^E. 



Saunders, Cat. Bds. Brit. Mus. XXV, p. 152 (1896); Sharpe, Hand-List 

 Bds. I. p. 138 (1899). 



Genus RHYNCHOPS Linnseus. 



Type. 



Rhynchops, Linn. Syst. Nat. I. p. 223 (1766); Saunders, Cat. 

 Bds. Brit. Mus. XXV. p. 152 (1896); Sharpe, Hand-List 

 Bds. I. p. 138 (1899) R. nigra. 



Rhynchopsalia, Gloger, Hand- u. Hilfsb. p. 463 (1842). 



Geographical Range. Temperate and tropical North and South 

 America, Tropical and juxta-tropical Africa and India to Burma. 



RHYNCHOPS MELANURA Swainson. 



Rayador, Azara, Apunt. III. p. 329 (1802). 



Rhynchops nigra, Licht Verz. Doubl. p. 80 (1823 : ex Azara) ; Less. Man. 

 d'Orn. II. p. 285 (1828: Chile); Darwin, Voy. Beagle, Birds, p. 143 

 (1841 : on the east and west coasts of South America between lati- 

 tudes 30 and 45) ; Fraser, P. Z. S. 1843, p. 119 (coast of Chile); 

 Hartl. Ind. Azara, p. 26 (1847) > Burm. La Plata Reis. II. p. 520 

 (1861 : Rio Parana); Pelz. Reis. Novara, Vog. p. 151 (1865: Chile); 

 Phil. & Landb. Cat. Av. Chil. p. 50 (1868); Scl. & Salv. P. Z. S. 

 1869, p. 634 (Arg. Rep.); iid. Nomencl. Av. Neotr. p. 147 (1873); 

 Durnf. Ibis, 1877, P- 2O (Buenos Ayres, Nov., Jan.) ; White, P Z. 

 S. 1882, p. 628 (Monte Grand, Buenos Ayres, Feb., not common); 

 Burm. An. Mus. Nac. Buenos Ayres, III. part X. p. 248 (1888: 

 Patagonia); Scl. & Huds. Argent. Orn. II. p. 193 (1889: Bahia 

 Blanca, breeding). 



