FAMILY PHASIANroAE 323 



Female, similar but with exposed crown feathers brown, and the 

 longer ones at rear duller brown. 



An erythristic phase is common in both sexes in which the con- 

 cealed crest feathers vary from cinnamon to chestnut, the upper sur- 

 face is brighter colored, and the ground color of the lower surface 

 is cinnamon brown to snuff brown. This variant, found throughout 

 the range, was supposed to be a distinct species for many years. In 

 Panama it was long recorded under the name Odontophorus vera- 

 guensis Gould. 



Chick in down, center of crown and occiput, and middle of the 

 back russet; forehead and side of crown buff to ochraceous-buff ; 

 rest of upper surface dark ochraceous-buff, mottled with dusky; un- 

 der surface buff, mixed with olive-gray. This natal down is followed 

 by a grayish brown plumage, with narrow elongate streaks that 

 terminate in enlarged spots of white narrowly edged with black on 

 breast, sides, back, and wing coverts. 



The chick is paler colored than that of O. gujanensis or O. 

 erythrops, the former being very dark, almost chocolate-brown above, 

 and the latter cinnamon-brown. (The description of the downy 

 young given under Odontophorm erythrops melanotis in Friedmann, 

 U. S. Nat. Mus. Bull. 50, pt. 10, 1946, p. 371, is taken from a 

 specimen of O. guttatus.) 



Adult, iris light brown ; bill dark neutral gray to black ; bare lores 

 neutral gray ; eyelids dull greenish gray ; tarsus and toes dull green, 

 with the claws fuscous. 



A juvenile female, three-fourths grown, had the iris hazel; cere, 

 base of maxilla, and mandible fuscous ; rest of maxilla light chestnut- 

 brown ; tarsus and toes dull greenish gray. 



Measurements. — Males (11 from Chiriqui), wing 134.7-144.1 

 (140.4), tail 55.7-68.5 (62.2), culmen from cere 16.2-18.5 (17.3), 

 tarsus 42.8-46.8 (44.5) mm. 



Females (11 from Chiriqui), wing 134.1-141.5 (136.0), tail 53.8- 

 65.6 (58.7), culmen from cere 15.3-17.8 (16.3), tarsus 40.2-44.3 

 (42.9) mm. 



Resident. Fairly common in the subtropical zone in western 

 Chiriqui from Cerro Horqueta across the slopes of the Chiriqui 

 Volcano, Cerro Picacho, and Cerro Pando to the highlands on the 

 Costa Rican boundary, mainly from 1,250 to 2,100 meters; recorded 

 at 1,100 meters at El Banco. Confined in Panama, according to 

 available records, to the Pacific slope. 



