Carriker : List of the Birds of Costa Rica. 395 



Carnegie Museum : Ujurras de Terraba, Miravalles, Bagaces (Car- 

 riker). Five skins. 



Upon comparing Costa Rican with South American specimens of 

 C. albilinea, it is at once evident that the northern bird is not entitled 

 to specific rank, for the differences are not such as could be used for 

 separating it specifically. 



As a general rule this handsome bird is to be found only at quite 

 high altitudes, where it breeds, being induced to descend in search 

 of food only at certain times of the year. In April I noticed it in 

 considerable numbers on the Volcan de Irazu above timber-line. Mr. 

 Lankester noted it in abundance on Poas, while in September they 

 were numerous on the high ridges of the Talamanca Cordillera above 

 Ujurras (about 7,000 feet), feeding upon the acorns which were just 

 beginning to fall. Their flesh was so bitter from this cause that they 

 could not be eaten. 



23. Columba nigrirostris brunneicauda n. subsp. 



Columba nigrirostris Sclater, Proc. Zool. Soc. Lond., 1859, 390 (Oaxaca, 

 Mexico). — Zeledon, An. Mus. Nac. de C. R., I, 1887, 127 (Talamanca).-- 

 Salvadori, Cat. Birds Brit. Mus., XXI, 1893, 322 (Turrialba [Arce] ). — 

 Sai.vin and Godman, Biol. Centr.-Am., Aves, III, 1902, 239 (Rio Matina, 

 Naranjo de Cartago, Trojas, Reventazon, Pozo Pital, Sipurio, Sarchi de Grecia, 

 Juan Vinas, Guayabal [Underwood]). — Bangs, Auk, XXIV, 1907, 292 

 (Boruca, El Pozo and Paso Real de Terraba [Underwood]). 



Chlorcenas nigrirostris Frantzius, Jour, fur Orn., JS69, 371 (Costa Rica). — 

 Lawrence, Ann. Lye. N. Y., IX, 1868, 135 (Costa Rica [Arce]; Coll. of 

 O. Salvin). 



U. S. Nat. Museum : Guayabo (Ridgway & Zeledon), Bonilla (Ridg- 



way) (Basulto), Pigres (Zeledon). 

 Bangs Collection : Pozo Azul, El General de Terraba (Underwood). 

 C. H. Lankester Collection : Ciruelas, Turrucares. 

 Carnegie Museum : Pozo Azul, Guapiles, Boruca, El Hogar (Carriker). 



Four skins. 



Type, adult <cT, Guapiles, March 3, 1903, collected by M. A. Car- 

 riker, Jr., and J. C. Crawford. Collection Carnegie Museum, No. 



Differs from C. nigrirostris nigrirostris in its smaller size, deeper 

 vinaceous tint of under parts, in having a brown tail, and in having the 

 under tail-coverts concolorous with the abdomen. 



True nigrirostris from British Honduras has the tail decidedly sooty- 

 grayish, while the coverts are bluish-slate, tipped with bluish-vinaceous. 



