468 Annals of the Carnegie Museum. 



from the list of the birds of Costa Rica. As it now stands, the first 

 record for Costa Rica is the specimen above cited. There is appar- 

 ently no reason why the bird should not be found there, and its 

 absence is unusual. 



1 60. Leptodon uncinatus (Temminck). 



Falco uncinatus Temminck, PI. Col., 1824, 103, 104, 105. 



Cymindis uncinatus Lawrence, Ann. Lye. N. Y., IX, 1868, 134 (San Jose 



[Frantzius]). 

 Leptodon uncinatus Sharpe, Cat. Birds Brit. Mus., I, 1874, 330 (no C. R. 



record). — Boucard, P. Z. S., 1878, 45 (Juan Vinas, one specimen). 

 Regerhinus uncinatus Nutting, Proc. U. S. Nat. Mus., V, 1882 (La Palrna de 



Nicoya). — Ridgway, Bull. U.S. Geol. and Geogr. Surv., 1876, I, 159 (C. R. 



[Frantzius]). — Salvin and Godman, Biol. Centr.-Am., Aves, III, 1901, 



102 (Barranca [Arce]). 



C. H. Lankester Collection : Juan Vinas. 



Carnegie Museum : Juan Vinas (Carriker). One adult. 



Probably found only over the central plateau and the Pacific slope, 

 but in small numbers. Nutting says it was common at La Palma de 

 Nicoya, but if it was, it certainly is not abundant anywhere else in 

 Guanacaste, for neither Underwood nor Lankester took it there, 

 nor did I ever meet with it. The single specimen which I secured 

 at Juan Vinas was in a small patch of second growth woodland on the 

 slope of a deep ravine. I saw no others. 



161. Leptodon cayennensis (Gmelin). 



Falco cayennensis Gmelin, Syst. Nat., I, 1788, 263. — Temminck, PI. Col., 270. 



Cymindis cayennensis Lawrence, Ann. Lye. N. Y. , IX, 1868, 134 (Gulf of 

 Nicoya [Coll. O. Salvin]). — Frantzius, Jour, fur Orn., 1869, 369 (C. R.). 



Leptodon cayennensis Sharpe, Cat. Birds Brit. Mus., I, 1874, 333 (no C. R. 

 reference). — Ridgway, Bull. U. S. Geol. and Geogr. Surv., I, 1876, 155 (Old 

 Karbor and Talamanca [Gabb]). — Zeledon, An. Mus. Nac. de C. R., I, 

 1887, 126 (Pozo Azul de Pirris and Birris de Cartago). — Salvin and God- 

 man, Biol. Centr.-Am., Aves, III, 1901, ico (references cited). — Bangs, 

 Auk, XXIV, 1907, 290 (El Pozo de Terraba [Underwood]). 



Bangs Collection : Pozo Azul de Pirris (Underwood). 



Carnegie Museum: Pozo Azul de Pirris, Boruca (Carriker). Three 



skins. 



Most of the records for this species are from the lowlands of the 

 Pacific, although a few have been taken elsewhere. Two were taken 

 by Gabb in southeastern Costa Rica, but it must be very rare, for I 



