Carriker : List of the Birds of Costa Rica. 751 



Rica from near sea-level up to 4,500 or 5,000 feet, being most abundant on 

 the Pacific slope between sea-level and 2,000 feet, and quite rare on the 

 Caribbean slope and in the highlands. They do not frequent the heavy 

 forests, but scattering trees in pastures, shrubbery along river banks, and 

 the borders of the woodland, keeping near to the ground as a rule. They 

 are very tame and unsuspecting, allowing a person to approach them very 

 closely without taking alarm. 



530. Polioptila bairdi Ridgway. 



Polioptila albiloris (not of Sclater and Salvin), Zeledon, An. Mus. Nac. de C. 

 R., I, 1887, 105 (Liberia and " Cartago " (?)). — Hellmayr, Tierreich, 18 

 Lief., 1903, 28, part (Miravalles, Costa Rica). — -Underwood, Ibis, 1896, 

 432 (Miravalles; footnote, O. Salvin). 

 Polioptila bairdi Ridgway, Proc. Biol. Soc. Wash., XVI, 1903, no (San Juan 

 del Sur, Nicaragua; coll. U. S. Nat. Mus.); Birds N. and Mid. Amer., Ill, 

 1904, 726 (western Nicaragua and Costa Rica: Liberia, Volcan de Mira- 

 valles, Cartago ?). 



Bangs Collection: Bagaces and Miravalles (Underwood). Three skins. 



C. H. Lankester Collection: Bagaces. 



Carnegie Museum: Bebedero and Ciruelas (Carriker). Four skins. 

 This is a very rare and local form in Costa Rica, occurring only in Gua- 



nacaste, apparently from the Tempisque Valley northward into Nicaragua, 



along the Pacific lowlands and foot-hills. This bird is easily distinguished 



by the absence of the white streak over the eye. Its habits are the same 



as those of the closely allied form P. super ciliar is. 



Family CINCLIDiE. 



531. Cinclus ardesiacus Salvin. 



Cinclus ardesicaus Salvin, Ibis, 1867, 121, pi. 2 (Cordillera de Tole, Veragua 

 [Arce]; coll. Salvin and Godman). — Lawrence, Ann. Lye. N. Y., IX, 

 1868, 92 (Dota Mts. [Zeledon]). — Frantzius, Jour, fur Orn., 1869, 290 (Dota 

 Mts.). — Salvin and Godman, Biol. Centr.-Am., Aves, I, 1879, 45 (Costa 

 Rican references). — Sharpe, Cat. Birds Brit. Mus., VI, 1881, 319 (Costa 

 Rica and Veragua). — Zeledon, An. Mus. Nac. de C. R., I, 1887, 105 (Santa 

 Maria de Dota). — Ridgway, Birds N. and Mid. Amer., Ill, 1904, 681 

 (mountains of Cliiriqui, Veragua, and Costa Rica: Dota Mountains); Auk, 

 XXIV, 1907, 105 (Costa Rica; crit.). 



Cinclus mexicanui Cherrie, Auk, VIII, 1891, 395 (mountains of Costa Rica, 

 common). — Ridgway, Auk, XXIV, 1907, 105 (not found in Costa Rica; 

 crit.). 



U. S. Nat. Museum: Irazu and Laguna de Cartago (Alfaro), San Lucas 

 and La Lagunaria de Dota (Basulto). 



