384 



REVIEW OF AMERICAN BIRDS. 



[part I. 



(23,326.) Type. 



CYCLORHIS, SwAiNSON. 



Cyclorhis, Swaik.son, Zool. Journal, III, 1828, 162. (Type Tanagra 

 guiunensis, Gm.) 



Form very stout ; the head broad. Wings rather longer than the narrow, 

 nearly even, or sliylitly rounded tail ; the quills graduated : the 1st more than 



Vyclorhis guiunensis, Sclatek. (Cayenne.) 



half the 2d, which about equals secondaries; the 4th or 5th longest; the 

 tips not attenuated. Bill very powerful, deep, much compressed (depth 

 almost equal to distance from nostril to notch of bill) ; culmen and gonys 

 much curved from base ; gape nearly straight ; tip of upper bill decurved 

 and with deep notch; tip of lower less distinctly marked. Nostrils small, 

 nearly circular, in anterior end of nasal fossa, with membrane above and 

 behind it. Frontal feathers directed somewhat forward, but not overhanging 

 nostrils, and with very few bristles ; those of rictus moderate. 



Feet stout (rather less so than in Dulus). Tarsus rather longer than middle 

 toe and claw ; distinctly scutellate anteriorly, and with one or two divisions 

 externally at lower end. Basal joint of middle toe entirely adherent exter- 

 nally to one and a half joints of outer ; internally, but slightly free and united 

 to half of adjacent joint. Lateral toes nearly as long as middle, reaching 

 over half the length of middle claw or even farther. Hind toe longer than 

 the lateral. Claws all very stout and sharp, much curved. 



Tito bill of CyclorhU, in its compression, great depth, and other 



