186 SUPERCILIOUS GUAN. 



municating with the beak, which has a membrane 

 about two inches long, descending from the base 

 of its lower mandible, and disappearing when the 

 bird is frightened : the base of the beak is furnished 

 with very short, straight, black feathers. 



It is a native of Paraguay, occurring in the 

 vicinity of rivers and lakes, but is more abundant 

 among trees : it lays eight eggs about October : 

 its cry consists in a repetition of the word yac, or 

 occasionally yacu, from whence its name is derived. 



SUPERCILIOUS GUAN. 

 (Penelope superciliaris.) 



PE. vertice cerviceque jusco-nigris, dorso cinereo-virescenti, pen- 

 nis griseo marginatis, tectricibus pennisque alarum secundariis 

 oirescentibusjulvo-marginatis, abdomine uropygioque riifis. 



(juan with the crown and top of the neck brown-black; the 

 back greyish-green, the feathers edged with grey ; the wing- 

 coverts, and secondary quills, greenish, edged with fulvous ; 

 the abdomen and rump rufous. 



Penelope superciliaris. Temm. Pig. Ind. p. 693. 



Pn61ope P6an. Temm. Pig. tt GaU. 3. p. 72. 



THE feathers of the forehead and of the top of 

 the head, in this species, are not at all elongated : 

 the occiput and the nape are of a brown-black : 

 the forehead possesses a few scattered hairs : from 



