BASILEUTERUS. 245 



Basileuterus culicivortis. 



Sylvia culiciuora, Light. Preis-Verzeich. 1830, no. 78 (Mexico ; Deppe 

 & Schiede). — Cab. Jour. 1863,57. — BasiUuterus culicivorus,BosAF. 

 Consp. 1850, 313.— Cab. Mus. Hein. 1850, 17. 



Muscicapa hrasieri, Gikapd, Birds Texas, 1841 , pi. vi, fig. 2. — Basileuterus 

 hraseri, Sclater, P. Z. S. 1855, 66 ; 1856, 292 (Cordova) ; 1859, 374 

 (Oaxaca). — Ib. Catal. 1861, 34, no. 208.— Sclatee & Salvih, Ibis, 

 II, 1860, 274 (Voloan, Guatemala). 



Hab. S. Mexico (both sides) ; Guatemala and Costa Rica. 



(No. 30,698.) Above greenish-ash, more tinged with olive on the upper 

 part of back and rump. Beneath yellow, the crissum somewhat tinged with 

 rufous. Top of head with a black stripe on each side from the bill, the inter- 

 mediate portion greenish-yellow, passing more into green on the nape, similar 

 in color to a supra-ocular stripe Loral region and space below eye greenish, 

 mixed with yellow. Spot anterior to eye, and a stripe tiehind it, dusky ; all 

 these markings on the side of head, however, obscure, and poorly defined. 



Specimens from Mexico and Guatemala, the former marked male, have the 

 median stripe of the head yellow. Others again, likewise from Guatemala 

 and Mexico, have the yellow of each feather passing towards the end more 

 Into brownish-orange, apparently unaccompanied by any other difi'ereuces. 



Length (of 30,698), 4.90; wing,-2.40 ; tail, 2.25 ;, graduation, .16; bill from 

 forehead, .50, nostril, .30, gape, .56 ; tarsus, .76 ; middle toe and claw, .56. 



This species differs from Basileuterus vermivorus and hivittatus, 

 of South America, in having the upper parts ashy instead of olive 

 green. The markings of the head are more as in biviltatus, as com- 

 pared with vermivorus. The supra-ocular stripe and other lighter 

 markings on the side of the head are greenish, and not ashy or gray- 

 ish in their tinge. The eyelids are yellow, not white. There is much 

 more yellow in the central stripe on top of heads even mixed with 

 orange, and the feathers are not tinged with gray at the tips. The 

 inside of the wing is greenish-yellow, not nearly white as in vermiv- 

 orus ; nor is there the decided indication of whitish in the chin. 



B. bivittatus, Laf., from Bolivia and Ecuador, as above stated, 

 differs in the olive back, in this agreeing with vermivorus. It agrees 

 more with culicivorus, and differs from vermivorus, judging from the 

 description, in larger size, and in the yellowish superciliary stripe 

 and circumocular region, instead of grayish-white. 



Note. — Since writing the preceding description, specimens have 

 been received from Mr. Carmiol, collected in Costa Rica, which 

 differ slightly in having a decidedly olivaceous gloss to the upper 

 plumage, especially on the rump and edge of the quills. I do not 

 note any other differences, and these may be merely seasonal. There 

 is, however, in this respect, a greater approximation to the B. bivit- 



