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BULLETIN 50. UNITED STATES NATIONAL MUSEUM 



scutella on outer side (then sometimes large and regularly obliquely 

 transverse and bending around posterior side, almost meeting those of 

 acrotarsium) ; middle toe two-thirds (C. g. rufiventris) to three-fourths 

 (C. unicolor) as long as tarsus, the lateral toes reaching to about pen- 

 ultimate articulation of middle toe (on the outer somewhat beyond), the 

 hallux as long as or slightly longer than combined length of first two 



Figure S. — Chamaepetes unicolor. 



phalanges of outer toe; claws moderate in size, rather strongly curved 

 (that of hallux especially), compressed. 



Plumage and coloration. — Gular region completely feathered except 

 anterior point and narrow lateral margins of chin ; entire loral and 

 orbital regions nude, the sides of forehead and anterior half of malar 

 region also nude but with sparse short bristles; feathers of pileum but 

 slightly if at all elongated; plumage in general with feathers moderately 



