574 



BIRDS OF BRITISH GUIANA. 



Total length 219 mm., exposed culmen 32, wing 106, tail 70, 

 tarsus 38, middle toe and claw 33. 



Adult female. Similar to the adult male but smaller. 



Total length 209 mm., exposed culmen 28, wing 98, tail 61, 

 tarsus 35, middle toe and claw 31. 



The type, as well as the female described, are both in the 

 McGonnell collection and. were collected by Mr. McConnell at 

 Mount Koraima during bis expedition in October 1898. 



Breeding-season. Unknown. 



Nest. Unrecorded. 



Eggs. Undescribed. 



Range confined to British Guiana. Mount Roraima [McConnell 

 collection). 



Habits. Unrecorded. 



Genus GYMNOMYSTAX Reichenb. 



Gymnomystax Reichenbaeh, Av. Syst. Nat. tab. Ixxiii. 1850. 

 Q. mexicanus (Linn.). 



Type 



Fig. 208. — Gymnomystax mexicanus. 



This genus is distinguished chiefly by the bare face. The bill is 

 long and sharply pointed, its width at the base being equal to about 

 half the length of the exposed culmen. The nostrils are exposed. 

 The wing is rounded, the third and fourth primaries are equal, 

 the second about equal to the fifth, and the first very slightly shorter 

 than the sixth. The tail is rounded at the tip and nearly as long as 

 the wing. The tarsus, middle toe and claw, and the exposed 

 culmen are about equal in length. Coloration : male and female 

 alike. 



