386 REVIEW OP AMERICAN BIRDS. [PART I. 



Head above nearly pure ash. Second 



quill shorter than 10th . . guianensis.^ 

 Head above washed with ochraoeous. 

 Second quill longer than 10th. Size 



larger viridis. 



Superciliary rufous reaching only to eye. 

 Lower mandible weak ; flesh color. 

 Head above strongly washed with 



ochraoeous ochrocephala. 



B. Vertex and nape olive green, like the back ; cheeks and 

 jugular band, with sides of breast, yellowish, or olive 

 green. Legs flesh color ? Lower mandible dusky. 

 Forehead chestnut brown, this color extending back- 

 ward to the nape as a superciliary band. Cheeks 

 and jugulum yellowish. Upper mandible pale virenticeps. 

 Forehead plumbeous, with a dark chestnut band 

 from nostrils to eye only. Cheeks and jugulum 

 olivaceous. Upper mandible black . . nigrirostris. 



Of the species described, C. suhflavescens and C. viridis are those which 

 have least strongly marked distinctive characters. 



In examining the preceding analytical arrangement of the species 

 of Gyclorhis some interesting geographical considerations present 

 themselves. The most northern species (C. fiaviventris) exhibits 

 most yellow beneath, this diminishing progressively in more southern 

 species, as C. subjiavescens (Costa Rica), and G. Jlavipectus 

 (northern part of South America). All these more northern species 

 have pale-colored legs, while those of Eastern South America have 

 dusky legs, and like those just mentioned have the vertex and nape, 

 with whole cheeks, more or less ash, in decided contrast to the 

 back. The two Andean, on the contrary, have these parts like the 

 back. All the species, as a rule, have the under mandible plumbeous 

 black at the base, caused by the deposit of a black pigment on the 

 bone ; this is only exceptionally absent except in ochrocephala, 

 where it seems never to occur. In all, the upper mandible is pale 

 in the dried skin ; said sometimes to be red in life ; in nigrirostris 

 only is it black. The iris is said in most species to be either red or 

 yellowish. 



Cyclorliis flaTiTentris. 



Cyclaris fiaviventris, Lafk. Rev. Zool. 1842, 133 (Santa Cruz, Mex.). — 

 Cyclorisfl. Bon. Consp. 1850, 330.— Cydorhisfl. Sclater, P. Z. S. 

 1856, 99; 1858, 448; 1859,363 (Jalapa) ; 1864,173 (City of Mexico). 



' Specimens from Ceara, Brazil (perhaps autumnal), have yellow extend- 

 ing over the breast, much as in fiavipecttis, but with dusky legs, the vertex 

 'jnged with ochraoeous. 



