BIRDS OF NORTH AND MIDDLE AMERICA 



103 



plumbeous-black above, the outer webs often uniform plumbeous- 

 black; secondaries uniform dark plumbeous, occasionally with traces 

 of lighter bars below; tail plumbeous-black to black, white basally, 

 narrowly tipped with white or deep mouse gray, and crossed by two 

 bands (the anterior one the narrower) of white, or pinkish buff, shading 

 to deep mouse gray posteriorly and toward the outer webs, which are 

 often uniform mouse gray above; bill pale yellow-green with dusky 

 tomium and black maxilla; iris white; feet orange-yellow, claws black; 

 cere, gape, and facial skin greenish j^ellow; eye- ring and bristled loral 

 streaked pea green; supra loral skin bright yellow. Unbarred variety : 

 Similar to the above description, but lacking entirely or partially 



Figure 9. — Chondrohierax uncinatus. 



the white barring on the underparts. Cinnamon-barred variety: 

 Similar to the above description, but with, the gray barring of the 

 underparts more or less replaced by cinnamon-brown or russet and 

 ynih more or less indication of a cinnamon or ochraceous-tawny 

 nuchal collar. 



Melanistic phase: Entire plumage deep fuscous-black, with a 

 slight bronze-purple-green gloss; the occiput with much basal white; 

 tail narrowly tipped with white and crossed by a smgle broad white 

 band; bill black above, dirty olive below, tipped with black; cere 

 and eyelids yellowish green; skin in front of eye blue-green, spot 

 above inner angle of eye orange-yellow; iris white; feet gamboge. 



Adult Jemale. — Brown phase: Forehead, auriculars, and some- 

 times the chin deep gull gray to deep neutral gTay, or dark plumbeous; 



