Carriker : List of the Birds of Costa Rica. 733 



in the Caribbean lowlands, especially in the Santa Clara Valley. It is 

 not found in the heavy forest but in open woodland, among scattered trees 

 and shrubbery, in pastures, and along the edges of streams. I found it 

 breeding abundantly about Guapiles and Guacimo, the nest being usually 

 placed among some vines hanging beside the trunk of some large tree left 

 in a pasture or on the edge of the bananas. They were invariably built 

 in the same manner and of the same sort of material. 



Nests were found with fresh eggs from April n to July 17. The nest 

 is made almost entirely of green moss with some weed-fibre intermixed, 

 and greatly resembles a bunch of moss hanging from a twig. The nest- 

 cavity is at the bottom, with the opening on one side, shielded by an over- 

 hanging curtain of moss, and the whole interior lined with fine weed-fibres 

 and a few hairs. They average about eleven inches in length and two 

 and one-half inches in diameter at the bottom. The eggs are pure white, 

 and usually three in number. Measurements: 10.5 to 11.5 X 15 to 15.5 



mm. 



505. Oncostoma cinereigulare (Sclater). 



Todirostrum cinereigulare Sclater, P. Z. S., 1856, 295 (Cordova, Mexico [Salle]). 



Oncostoma cinereigulare Sclater, Cat. Am. Birds, 1862, 208. — Lawrence, 

 Ann. Lye. N. Y., IX, 1868, 111 (Angostura [J. Carmiol]). — Frantzius, Jour. 

 fUr Orn., 1869, 307 (Costa Rica). — Zeledon, An. Mus. Nac. de C. R., I, 

 1887, 116 (Jimenez, Las Trojas, Pozo Aziil de Pirris, Pacuare). — Sclater, 

 Cat. Birds Brit. Mus., XIV, 1888, 77 (Mexico to Chiriqui, no C. R. specimens). 



— SALViNand Godman, Biol.Centr.-Am.,Aves, II, 1888 (no C. R. specimens). 



— Cherrie, Expl. Zool. en C. R., 1 890-1, 31 (Boruca, Terraba, and Buenos 

 Aires). — Underwood, Ibis, 1896, 438 (Miravalles). — Ridgway, Birds 

 N. and Mid. Amer., IV, 1907, 358 (Talamanca, Jimenez, Angostura, Pozo 

 Aziil de Pirris, Volcan de Miravalles). — Bangs, Auk, XXIV, 1907, 300 

 (Boruca and El Pozo de Terraba [Underwood]). 



Bangs Collection: Pozo Azul de Pirris, Miravalles, Bolson (Underwood). 



C. H. Lankester Collection: Guacimo, Miravalles. 



Carnegie Museum: Guacimo, Rio Sicsola, Cuabre, Miravalles, Bagaces, 



El Hogar, Buenos Aires (Carriker). Fourteen skins. 



This curious little flycatcher is distributed over the whole of the Carib- 

 bean and Pacific lowlands, up to about 1,500 feet. It is fond of thick, 

 vine-covered jungle, second-growth scrub, and shrubbery along streams, 

 but does not go into the heavy forest for any distance. Like Todirostrum, 

 it catches its food on the wing, darting out from its perch at passing in- 

 sects. 



I found a nest of this species near Guapiles in a lime tree, growing at 

 the edge of a pasture. The birds were around the nest when I first dis- 



