28 Field Museum of Natural History — Zoology, Vol. XII. 



zuela. Elevation 350 ft. Adult male in Field Museum of Natural 

 History (Conover Collection). Collected Feb. 25, 1920 by W. H. 

 Osgood and Boardman Conover. Orig. No. 3494. 



Characters. Adult Male: Similar to O. g. marmoratus, but mantle 

 paler and more grayish; ear coverts and sides of neck more rusty; 

 underparts more heavily mottled with black and buffy, the markings 

 taking the form of broadly sagittate spots rather than irregular bars; 

 forehead, chin, and sides of throat paler, the last definitely flecked 

 with white. Similar io O. g. guianensis, but having chestnut ear coverts 

 instead of buffy ochraceous and differing also in the paler throat and 

 mantle. Hind neck and interscapular region gray finely barred and 

 mottled with black; forehead, crown, and crest brownish chestnut, 

 the feathers of the forehead with whitish buff centers; sides of head 

 rufescent, the ear coverts dark chestnut; lower back and rump light 

 day color becoming slightly darker on upper tail coverts, numerous 

 feathers with ochraceous tips and prominent subapical, sagittate black 

 spots; barring on outer webs of primaries light whitish buff; edges 

 of inner webs of scapulars ochraceous buff; chin dirty white; throat 

 light gray, each feather with a broad whitish bar near the tip giving 

 a white-dotted appearance which extends to the maxillary region ; 

 lower f oreneck gray mottled with dusky ; rest of underparts light chest- 

 nut with generally distributed sagittate, black and buff spots. 



Remarks. This bird is distinguished from both O. g. marmoratus 

 and O. g. gidanensis by the gray hind neck and mantle, the white spot- 

 ting on the throat, and the extensive mottling of the underparts. By 

 the dark color of its ear coverts it seems to show closer affinity tD 

 marmoratus than to guianensis, but in other respects it differs more 

 from either of these forms than they do from each other. A male 

 specimen from Puerto Valdivia, Colombia, kindly loaned by Dr. F. M. 

 Chapman, has been regarded as representative of marmoratus. 



The type of this new form was the only specimen of its kind 

 taken. It was found in company with its mate, or another bird of the 

 same species, squatting in thick brush and was shot at close range but 

 fortunately was recovered in excellent condition. According to native 

 reports, the species is not common. 



Native names, Perdis Colorado, Gallito. 



Crax daubentoni Gray. 

 Rio Cogollo, I. 

 The only specimen preserved is a female which differs from descrip- 



