BASILEUTERUS. 



249 



bright yellow, abrnptly defined against the whitish of under parts. Inside 

 and edge of wings yellow ; Hanks and crissnra pale brownish-fnlvous ; tibiio 

 more ashy. No spots or bands on wings or tail. The feathers along the 

 middle of 'orehead and vertex with concealed yellow at the base. 



Length, 4.80 ; wing, 2.00 ; ditference between 1st and 4th (longest) quills, 

 .24; tail, 2.40 ; its graduation, .55 ; bill from gape, .55 ; tarsus. .80. 



This species is sometimes described as quite cinereouc nhove ; 

 this, liowever, depends on the state of plumnj^e — perfect specimens 

 being nearly as olivaceous as in delatlrii. Occasionally specimens 

 are found in which the line of demarcation behind of the yellow 

 breast is obscured by the color passing backwards over the belly in 

 a light wash pervading the whole under parts, the edges of the 

 feathers brighter yellow, leaving the anal region, however, nearly 

 white. The flanks, cvissum, and tibiae are then tinged with greenish 

 olive. 



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(30,876.) IrU reddish-browa. 



Basileuteriis delattrii. 



Basileuterus delatlrii, BoN. Comptes Rendus, XXXVIII, 1854, 383. — Ib. 

 Notes Orn. 1854, 63 (Nicaragua).— Sclateh, P. Z. S. 18tJ0, 250 

 (Orizaba). — Ib. Catal. Am. Birds, 1861, 35, no. 211. — Sclateb & 

 Balvin, Ibis, II, 1860, 274, Duenas (Guatemala), May 8. 



Edh. Mexico and Quatemala f 



(No. 30,700.) Similar to rujifrons in color of head, the olive green of the 

 back brighter, this color invading and replacing the ashy of the nape and 

 pides of neck ; the infra-ocular white band, less distinct behind, but appa- 

 rently extending behind the eyes. Whole under parts greenish-yellow, a 

 little paler on middle of be'.ly ; flanks olive green ; the sides behind and 

 crissura tinged with fulvons. Wings much rounded, about equal to the 

 lateral tail feather; 1st quill shorter, or not longer than the secondaries, aa is 

 the case in rvjifrons. 



Total length, 5.10; wing, 2.10; tail, 2.70; graduation, .52; diflference be- 

 tween 1st and 4th quills (longest), .28 ; length of bill from nostril, .31 ; along 

 gape, .60 ; tarsus, .82. 



Since receiving an authentic specimen from Mr. Salvin I have 

 found that several specimens from Mexico, formerly considered to 



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