438 Annals of the Carnegie Museum. 



Like several other species of ducks, we have but one record of the 

 taking of the Ruddy Duck in Costa Rica, but apparently this can be 

 depended upon. Frantzius gives " Irazu" as the locality where this 

 bird was collected, but I know of no place on the Volcan de Irazu 

 where the bird would be likely to be found. 



Family PHALACROCORACID^. 

 113. Phalacrocorax vigua vigua (Vieillot). 



Hydrocorax vigua Vieillot, N. Diet, d' Hist. Nat., VIII, 1817, 90. 

 Phalacrocorax vigua Ogilvie-Grant, Cat. Birds Brit. Mus., XXVI, 1898, 378 



(Costa Rica [Endres]). — Salvin and Godman, Biol. Centr.-Am., Aves, 



III, 1901, 154. 

 Phalacrocorax brasitianus Zeledon, An. Mus. Nac. de C. R., I, 1887, 132 (Rio 



Sucio). — Cherrie, Expl. Zool. en C. R., 1891-2, 1893, 57 (Rio Grande de 



Terraba). 

 Phalacrocorax sp. Richmond, Proc. U. S. Nat. Mus., XVI, 1893, 432 (Rio 



Frio). 



Bangs Collection : Vicinity of San Jose (Underwood). 

 C. H. Lankester Collection : Matina River. 

 Carnegie Museum : Guacimo (Carriker). One skin. 



The Costa Rican bird agrees exactly with specimens of true P. vigua 

 from Colombia, as do also the birds from Panama in Mr. Bangs' Col- 

 lection. It is very abundant during the fall and winter months in all 

 the rivers of the Caribbean slope, following the larger streams well up 

 into the interior. I do not know whether the birds are found on the 

 Pacific coast or not, but I presume they are, although I have never 

 seen them there. 



The birds frequenting the Caribbean slope evidently breed on some 

 island in the Caribbean not far distant from Costa Rica, and spend 

 the time after the breeding season in the rivers inland. They are 

 usually to be seen standing on a rock in the riffles, watching for fish, 

 and can be seen by the hundreds in the Reventazon River alongside 

 the railway to San Jose. 



Family PLOTID^. 

 114. Anhinga anhinga (Linnaeus). 



Plotus anhinga Linn^us, Syst. Nat., ed. 12, I, 1766, 218. — Lawrence, Ann. 

 Lye. N. Y., IX, 1868, 143 (Gulf of Nicoya [Coll. Salvin]). — Frantzius, 

 Jour, fiir Orn., 1869 (San Jose). — Nutting, Proc. U. S. Nat. Mus., V, 

 1882, 405 (La Palma de Nicoya). — Ogilvie-Grant, Cat. Birds Brit. Mus., 

 XXVI, 1898, 419 (Nicoya [Arce]). — Salvin and Godman, Biol. Centr.- 

 Am., Aves, III, 1901, 156. 



