734 Annals of the Carnegie Museum. 



covered it, but as yet no eggs had been laid. Upon my return several days 

 later I found the nest abandoned and partly destroyed. It was a tiny 

 flattened cup-shaped structure, made of fine grasses and weed-fibres, and 

 lined with vegetable down and a few hairs, and placed in a cluster of small 

 branches on the top of a limb. 



506. Onychorhynchus mexicanus fraterculus Bangs. 



Muscivora mexicana (not of Sclater, 1856) Lawrence, Ann. Lye. N. Y., IX, 

 1868, 114 (Atenas). — Frantzius, Jour, fur Orn.. 1869, 308 (Costa Rica). — 

 Boucard, P. Z. S., 1878, 63 (San Ramon). — Nutting, Proc. U. S. Nat. 

 Mus., V, 1882, 396 (La Palma de Nicoya, descr. habits, etc.). — Zeledon, 

 An. Mus. Nac. de C. "R., I, 1887, 116 (Las Trojas). — Sclater, Cat. Birds 

 Brit. Mus., XIV, 1888, 193, part (Miravalles and Bebedero [Arce]). — Salvin 

 and Godman, Biol. Centr.-Am., Aves, II, 1889, 53 (Costa Rican references). 

 — Cherrie, Expl. Zool. en C. R., 1890-1, 1893, 34 (Lagarto and Terraba, 

 rare). — Underwood, Ibis, 1896, 438 (Miravalles). 



Onychorhynchus mexicanus Oberholser, Auk, XVIII, 1901, 194, part (crit.). 



Onychorhynchus mexicanus fraterculus Bangs, Proc. N. Eng. Zool. Club, III, 

 1902, 86 (Santa Marta, Colombia). — Ridgway, Birds N. and Mid. Amer., 

 IV, 1907, 356 (Nicaragua to Colombia; — Costa Rica: La Palma de Nicoya, 

 Bebedero, Volcan Miravalles, Atenas, Las Trojas, Pozo Azul de Pirris, San 

 Ramon). — Bangs, Auk, XXIV, 1907, 302 (Boruca, Paso Real, and El Pozo 

 de Terraba [Underwood]). 



Bangs Collection: Miravalles, Tenorio, Bolson, and El General de Ter- 

 raba (Underwood). 

 Carnegie Museum: Pozo Azul de Pirris, Miravalles, Bagaces, El Pozo de 

 Terraba, Boruca (Carriker). Eight skins. 



This handsome flycatcher is found in Costa Rica only on the Pacific 

 lowlands, below 2,000 feet, and is commonest below 1,000 feet, especially 

 in the region of the Gulf of Nicoya. The birds frequent the heavy forest, 

 especially near a stream, and are usually seen in pairs. As a rule they are 

 quiet, and, when sitting motionless, the crest is not shown, lying flat on 

 the nape. When alarmed or in the breeding season the male often utters 

 a loud shrill call, quite similar to that of most species of Myiarchus. I 

 did not succeed in finding the nest of this bird, so will append a description 

 of it as given by Mr. M'Leannan (Lawrence, Ann. Lye. N. Y., VII, 1862, 



329)- 



"The nest, which is placed in very secluded spots, is surrounded by a 

 mass of loose straggling material ; when first observed he had no suspicion 

 of its being a bird's nest, but discovered it to be so by seeing the bird enter; 

 inside of the loose grass, etc., is a curious hanging structure, about three 



