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Show 1871] ON NEOTROPICAL LARIDEE. 571 We have before us specimens of this well-marked species from the Falklands, Straits of Magellan, and coast of Southern Brazil, that from the Falklands being Sclater's type. Messrs. Philippi and Landbeck tell us that it ranges up the western coast of South America as far as Valdivia. P. Max. obtained it off Rio de Janeiro on the eastern coast, but did not distinguish from S. hirundo. This species is easily distinguishable by its wholly coral-red bill from all other Neotropical species. 7. STERNA DOUGALLI. Sterna dougalli, Mont. Orn. Diet. ; Sund. Ofv. af K. V. A. Forh. 1869, p. 589. Sterna paradisea, Baird, B. N. A. p. 863 ; Leotaud, Ois. de Trim p. 539; Coues, Ibis, 1864, p. 389; Salvin, Ibis, 1866, p. 199; Gundl. Rep. F. N . i. p. 392. Hab. Coast of Cuba (Gundl.) ; Belize (Salvin) ; Trinidad (Leotaud) ; St. Bartholomew (Sund.). This is a northern, or rather "Arctopolitan," species, which descends as far south as the West Indies and coasts of Central America. Mr. Salvin found a few pairs on one of the Keys of Belize in Mav 1862, and believes they were preparing to breed there. 8. STERNA SUPERCILIARIS. Hati ceja blanca, Azara, Apunt. iii. p. 377. Sterna superciliaris, Vieill. N. D. xxxii. p. 126, et E. M . 350. Sterna argentea, Max. Beitr. iv. p. 871; Pelz. Orn. Bras. p. 325 ; Burm. Syst. Ueb. iii. p. 452, et La Plata-Reise, ii. p. 519; Coues, Ibis, 1864, p. 390; Scl. et Salv. P. Z. S. 1866, p. 200. Hab. Paraguay (Azara); Rio Parana (Burm.); Cuyaba (Natt.); coast of Brazil (Max.) ; Ucayali (Bartl.) ; Columbia (Coues). W e have specimens of three Neotropical species of the group of little Terns (Sternula) now before us. They may be readily distinguished by the colour of their bills, which in the present bird is of a uniform yellow throughout, in S. antillarum has a small black tip to both mandibles, whilst in S. exilis the whole apical half is black. Besides, S. exilis has a much more slender bill than the two allied species, and its under plumage is grey, not white. Our skins of this Tern are from Southern Brazil (Rogers) and Cuyaba (Natt.) ; and we have also examined Mr. Bartlett's Ucayali specimens. 9. STERNA ANTILLARUM. Sterna antillarum, Lesson, Descr. M a m m . et Ois. p. 256 (1848) ; Coues, Proc. Ac. Phil. 1862, p. 552; Ibis, 1864, p. 390; Salv. Ibis, 1866, p. 199 ; Gundl. Repert. F. N. i. p. 393. Sterna argentea, Leotaud, Ois. de Trin. p. 545. Sterna frenata, Gambel, Pr. Ac. Phil. 1848, p. 128. Hab. Coast of Cuba (Gundl.); Trinidad (Leotaud); British Honduras (Salvin). Of this Tern Mr. Salvin's specimens have been examined by Dr. |
