604 Annals of the Carnegie Museum. 



bean foothills, but does not descend into the lowlands. The only 

 place I saw the bird was at Juan Vinas, where it was found in the 

 thickets of the pastures and on the steep hillsides overgrown with a 

 dense jungle of shrubbery and wild plantains. It was not common 

 and no females were seen ; it being the breeding season, the females 

 were probably incubating. 



338. Thamnophilus doliatus pacificus Ridgway. 



Lanius doliatus Linnaeus, Syst. Nat., ed. 12, I, 1766, 136 (Cayenne). 



Thamnophilus doliatus Cabanis, Jour, fur Orn., 1861, 242 (Costa Rica [Frant- 

 zius]). — Lawrence, Ann. Lye. N. Y., IX, 1868, 107 (citation of Cabanis' 

 record). — Zeledon, An. Mus. Nac. de C. R., I, 1887, 114, part (Las Trojas 

 and Pozo Azul de Pirris). — Sclater, Cat. Birds Brit. Mus., XV, 1890, 207, 

 part (Nicoya [Arce], San Mateo [Carmiol]). — Salvin and Godman. Biol. 

 Centr.-Am., Aves, II, 1892, 202, part (Costa Rican references). — Cherrie, 

 Auk, I X, 1892, 250 (San Jose, a rare straggler); Expl. Zool. en C. R., 1890-1, 

 1893, 41 (Lagarto, Boruca, and Buenos Aires). — Underwood, Ibis, 1896, 

 440 (Bebedero). — Bangs, Auk, XXIV, 1907, 296 (Boruca, Paso Real and 

 El Pozo de Terraba [Underwood]). 



Thamnophilus affmis Lawrence, Ann. Lye. N. Y., IX, 1868, 107 (San Jose 

 [Frantzius], San Mateo and Sarchi [Cooper]). 



Thamnophilus nigricristatus Boucard, P. Z. S., 1878, 60, part (San Mateo). 



Thamnophilus doliatus affinis Nutting, Proc. U- S. Nat. Mus., V, 1882, 396 

 (La Palma de Nicoya). 



Thamnophilus doliatus pacificus Ridgway, Proc. Biol. Soc. Wash., XXI, 1908, 

 193 (type fiom Chinandega, Nicaragua; coll. U. S. Nat. Mus. [Hicks]; 

 Pacific slope from Chiapas, Mexico, to western Panama). 



U. S. Nat. Museum : Bebedero (Underwood), Pozo Azul de Pirris 



(Zeledon), Coyolar (Alfaro). 

 Bangs Collection : Buenos Aires and El General de Terraba, Bolson, 



Coralillo (Underwood). 

 Carnegie Museum : Bebedero, Miravalles, Bagaces, Boruca, and 



Buenos Aires (Carriker), Puriscal (Underwood). Seventeen 



skins. 



The west coast Central American form of T. doliatus is found in 

 Costa Rica over the whole of the Pacific lowlands and lower slopes, 

 occasionally straggling up as high as San Jose (3,500 feet). It is 

 most abundant in Guanacaste and in the Terraba Valley, the condi- 

 tions present in those two regions being more suited to the habits of 

 the birds. They are not forest inhabitants, but keep in the thickets 

 and open scrubby woodland, especially along the borders of the 

 "sabanas." I found them very abundant around Buenos Aires in 



