Carriker : List of the Birds of Costa Rica. 727 



caste. It is again found high up in the Dota Mountains where the cool 

 humid conditions are similar to those of the higher Caribbean slope. 



The nest resembles a bunch of trash hanging from the tip of a limb, 

 small at the top, and increasing in size downward to a diameter of about 

 eight inches at the bottom. The opening is on one side at the bottom, 

 overhung by the material of the nest, and extending upward for about 

 four inches to the rim of the cavity of the nest. I have never seen the eggs. 



497. Platytriccus albogularis (Sclater). 



Platyrhynchus albogularis Sclater, P. Z. S., i860, 68 (Pallatanga, Ecuador); 

 Cat. Birds Brit. Mus., XIV, 1888, 67, pi. 8, fig. 2 (Irazu [Rogers]). — Salvin 

 and Godman, Biol. Centr.-Am., Aves, II, 1888, 6 (Costa Rica to Peru). 



Platyrhynchus albigularis Boucard, P. Z. S., 1878, 62 (Navairo). 



Platyrhynchus cancrominus Lawrence, Ann. Lye. N. Y., IX, 1868, no (Na- 

 varro). — Frantzius, Jour, fur Orn., 1869, 306 (Navarro). 



Platytriccus albogularis Ridgway, Proc. Biol. Soc. Wash., XVIII, 1905, 211 

 (critical); Birds N. and Mid. Amer., IV, 1907, 384 (Navarro, Naranjo, Irazu, 

 Cartago, La Estrella de Cartago, Azahar de Cartago, Cariblanco de Sara- 

 piqui). 



U. S. Nat. Museum: Los Reyes, La Lagunaria, and Santa Maria de Dota 



(Basulto). 

 Acad. Nat. Sci. Philadelphia: La Estrella de Cartago and Azahar de 



Cartago (Underwood). 

 Bangs Collection: Cariblanco de Sarapiqui, Cerro de Santa Maria, Azahar 

 de Cartago, Tenorio, El General de Terraba, Pozo Azul de Pirris (Under- 

 wood). 

 Fleming Collection: Carrillo and Cariblanco de Sarapiqui (Underwood). 

 Carnegie Museum: Juan Vinas (Carriker). One skin. 



This species is found on the Caribbean slope from about 1,500 feet up- 

 wards, and in the forests of the central plateau, but is not found on the 

 Pacific slope of central or northern Costa Rica. Apparently it has crossed 

 over to the Dota Mountains (in southwestern Costa Rica) where cool and 

 very humid conditions are similar to those found on the higher Caribbean 

 watershed. I took but one specimen of this species at Juan Vinas, hence 

 know little of the habits of the bird, but I judge that they are practically 

 the same as those of the preceding species. 



Mr. Ridgway gives Pozo Azul de Pirris among the localities for this 

 species, which seems to me to be, if correct, most unusual, for this bird 

 is not found at low altitudes, even on the Caribbean slope, and Pozo Azul 

 is only about 500 feet above sea-level. 



