Carriker: List of the Birds of Costa Rica. 533 



Proc. N. Eng. Zool. Club, 1908, 25 (Volcan de Irazu, Dec. 8, 1906, $ — melan- 

 istic individual [Underwood]). 



U. S. Nat. Museum : Volcan de Turrialba (Ridgway and Zeledon), 



Volcan de Poas and Coliblanco (Ridgway), Las Vueltas de Dota 



( Basu 1 to). 

 Bangs Collection : Irazu (Underwood). 



C. H. Lankester Collection : Volcans de Irazu, Poas, and Turrialba. 

 Carnegie Museum : Volcans de Irazu and Turrialba and Ujurras de 



Terraba (Carriker). 



This handsome species is confined to the high mountains of Costa 

 Rica and Chiriqui, rarely being found below 6,000 feet, and most 

 abundantly on the high volcanoes just below timber-line. It is exclu- 

 sively a bird of the forest, preferring the most humid conditions. 



250. Thalurania colombica venusta (Gould). 



Ornismya colombica Bourcier, Ann. Soc. Phys. et Nat. Lyon, VI, t. 6 (Colom 

 bia). 



Thalurania venusta, Gould, P. Z. S., 1852, 9 (Chiriqui). — Lawrence, Ann- 

 Lye. N. Y., IX, 1868, 122 (Angostura [J. Carmiol], Tucurriquif Zeledon]). — 

 Frantzius, Jour, fur Orn., 1869, 315 (Angostura and Tucurriqui). 



Thalurania colombica Boucard, P. Z. S., 1878, 69 (San Carlos and Juan Viiias). 

 — Ridgway, Proc. U. S. Nat. Mus., Ill, 1880, 313 (Costa Rica). — Zeledon, 

 An. Mus. Nac. de. C. R., I, 1887, 121 (Naranjo de Cartago, Jimenez). — 

 Salvin, Cat. Birds Brit. Mus., XVI, 1892, 79, part (Tucurriqui). — Salvin 

 and Godman, Biol. Centr.-Am., Aves, II, 1892, 266 (Costa Rica). — 

 Hartert, Tierr., 1900, 86, part (Middle America). 



Thalurania columbica venusta Bangs, Auk, XXIV, 1907, 296 (Boruca, El Pozo 

 and Barranca de Terraba (Underwood). 



U. S. Nat. Museum : Bonilla and Guayabo (Ridgway and Zeledon) 



(Basulto). 

 Bangs Collection: Carrillo, Cariblanco, Pozo Azul (Underwood). 

 C. H. Lankester Collection : Cariblanco de Sarapiqui, Banana River. 

 Carnegie Museum : Guapiles and Volcan de Turrialba, 2,000 feet 



(Carriker & Crawford) ; Pozo Azul de Pirris, Rio Sicsola, Cuabre, 



El Pozo de Terraba, Boruca, Tucurriqui, El Hogar, Ciruelas, 



Guacimo (Carriker). Thirty-eight skins. 



I quite agree with Mr. Bangs in setting up Cabanis' name for the 

 birds of this species from Costa Rica and Chiriqui, as, while the 

 differences are small, they are quite constant (in adult birds). Costa 

 Rican birds show much more blue on the back than specimens from 

 Santa Marta ; the rump is darker and the tail deeper purple. The 



