248 



REVIEW OF AMERICAN BIRDS. 



[part I. 



scarcely extending over occiput. Wing nearly 

 as long as middle tail feather .... mesochrijsus. 

 Cheeks, ocular region, and lores chestnut. A superciliary 

 stripe bright yellow, bordered above by dusky. 



Whole under parts yellow .... belli. 



Basileuterus melanogeiiys. 



Basileuterus melanogenys, Baird, n. S. 

 Hab. High-lands of Costa Rica. 



(No. 30,497.) Above ashy olive, the quills and tail feathers edged with 

 brighter, edges of the latter slightly tinged with rufous. A square patch of 

 chestnut brown on top of head. The sides of head black, encircling the eyes, 

 each feather white in the centre. A broad stripe of white from base of bill 

 passing over the eye, and margined above by black, which thus borders the 

 rufous crown externally. The forehead mixed black and white. Beneath 

 dull whitish, the sides and to some extent the breast, tinged with olivaceous 

 ash ; the chin dusky on account of the blackish tips of the feathers. 



The white feathers about the head have all a tendency to black tips and 

 edges, producing the black markings — very few feathers being entirely black. 



The wings are a little shorter than the tail. The bill is more slender, and 

 the culmen less decurved than in most species of its section. 



Total length, 5.50 ; wing, 2.50 ; tail, 2.65 ; graduation of tail, .35 ; differ- 

 ence between 1st and 4th quills, .40 ; length of bill from forehead, .50, from 

 nostril, .30; along gape, .58 ; tarsus, .85. 



(30,497.) Type of species. 



Basileuterus rufifrons. 



Setophaga 7-uJifrons, Swain.son, Animals in Menageries, 1838, 294. — Box. 

 Conspectus, 314. — Basileuterus rujifrons, Bon. Consp. 1850, 314. — 

 ScLATEE, P. Z. S. 1856, 291 (Cordova) ; 1858, 299 (Oaxaca).— Ib. 

 Catal. 1861, 35, no. 210.— Baird, Birds N. Am. 1858, 296. 



Hah. Mexico ; northwest to Mazatlan. 



Whole top of the head with the ears reddish or chestnut brown ; nape and 

 sides of neck ashy. Rest of upper parts olive green, with an ashy tinge of 

 greater or less intensity. A white stripe from each side of the bill (meeting 

 narrowly on the forehead) over the eye, and another pair from lower jaw 

 meeting on the chin and passing beneath the eye, meets its supra-ocular fellow 

 behind the ears, their junctions, however, concealed by the chestnut ear 

 coverts. Lores, and a short space behind the eye dusky. Throat and breast 



