690 Annals of the Carnegie Museum. 



1890-1, 1893, 33 (Lagarto, Boruca, and Buenos Aires); Auk, IX, 1892, 251 

 (San Jose, descr. of nest and eggs). — Underwood, Ibis, 1896, 438 (Mira- 

 valles). 



Megarhynchus pitangua mexicanus Ridgway, Birds N. and Mid. Amer., IV, 1907, 



665 (southeastern Mexico to Panama. — Costa Rica: Turrialba, Grecia, 



Barranca, San Jose, Dota, Sipurio, El Cedral de Asseri, Carrillo, Bonilla, 



Jimenez, Volcan de Miravalles, San Lucas). 



U. S. Nat. Museum: Guayabo (Ridgway and Zeledon) ; Bonilla and Santa 



Maria de Dota (Basulto). 

 Bangs Collection: Pozo Azul de Pirris, El General de Terraba, Tenorio, 



Carrillo (Underwood). 

 C. H. Lankester Collection: Cachi. 

 Carnegie Museum: (Carriker Guapiles & Crawford); San Jose, Escazu, 



Rio Sicsola, Miravalles, Buenos Aires (Carriker). Fourteen skins. 



This widely distributed tyrant-bird is found in practically all parts 

 of Costa Rica from sea-level up to 5,000 feet, but more abundantly in the 

 lowlands and foot-hills. 



Its habits are the same as those of Pitangus and Myiozetetes, and as a 

 rule it is found in the same sort of localities. I found it very common 

 along the Sicsola River in company with Pitangus sulphuratus derbianus 

 and Myiozetetes texensis texensis. The birds are fond of making their nests 

 on the broken snags in the river, wherever they project from eight to 

 ten feet above water. The nest is constructed of grass and weed- 

 stalks in precisely the same manner as those of Pitangus and Myiozetetes, 

 that is, as an elbow-shaped affair, with the entrance at one end below, with 

 the nest-cavity and eggs in the other end. They are usually about four- 

 teen inches long and about eight inches in diameter at the larger end. The 

 nest-cavity is lined with fine grass and feathers. The eggs are creamy- 

 white, sparsely speckled and spotted about the larger end with chestnut 

 and dark lilac. Measurements: 30 X 19.5, 29.5 X 23, and 29 X 21 mm. 



442. Myiodynastes hemichrysus (Cabanis). 



Hypermitres chrysocephalus Cabanis, Jour, ftir Orn., 1861, 247 (Costa Rica). 



Hypermitres hemichrysus Cabanis, Jour, ftir Orn., 1861, 247, in text (Costa Rica). 



Myiodynastes hemichrysus Lawrence, Ann. Lye. N. Y., IX, 1868, 114 (Costa 

 Rica). — Frantzius, Jour, fur Orn., 1869, 308 (Costa Rica). — Sclater, 

 Cat. Birds Brit. Mus., XIV, 1888, 188 (no Costa Rican specimens). — Salvin 

 and Godman, Biol. Centr.-Am., Aves, II, 1889, 50 (Costa Rican references). 

 — Ridgway, Birds N. and Mid. Amer., IV, 1907, 662 (western Panama and 

 Costa Rica: Barranca, Escazu, and Azahar de Cartago). 



Myiodynastes superciliaris Lawrence, Ann. Lye. N. Y., VIII, 1867, 470 (Bar- 

 ranca [Carmiol]). 



