138 GUAN. 



lower mandible, a red membrane passes downwards for two inches, 

 in the manner of the Turkey, but when the bird is irritated this 

 disappears ; at the base of the bill some short, narrow, black feathers; 

 the forehead, crown, and one-third of the neck, are black, the rest of 

 the neck, upper part of the back, and wing coverts dusky black, the 

 feathers slightly edged with white ; the rest of the back, belly, and 

 thighs, chestnut ; quills and tail black, the last much rounded in 

 shape, and consists of twelve feathers, the outer being shorter than 

 the middle ones by three inches. 



This is not uncommon at Paraguay ; there called Yacuhu, or 

 Black Yacu; by the Spaniards about the River Plate, Pabo di Monte, 

 or Mountain Turkey. Is is mostly found about rivers and lakes, trees 

 being most abundant in such places : it has a sharp cry like the word 

 Yac, Yac, frequently repeated, and very loud : said to make the 

 nest in October, and to lay eight eggs. Nothing more of this bird 

 is known, than what is collected from M. d'Azara. 



7.— SUPERCILIOUS GUAN. 



Penelope superciliaris, Peoa, Temm. Pig. Sf Gall. 8vo. p. 72. 



LENGTH twenty-three inches. Bill fourteen lines long, dusky 

 purple; irides reddish brown; forehead and crown smooth, but on 

 the first some straggling hairs ; sides of the head covered with a 

 dusky purple, naked skin ; head and nape dusky brown ; at the 

 lower jaw arises a black band, and passes over the ear; from the 

 nostrils a band of white, passing over the naked part to the ears ; 

 beginning of the back greenish, the feathers edged with grey ; wing 

 coverts, second quills, and tail coverts deep green, bordered with 

 light rufous ; lower part of the neck and breast cinereous brown, 

 with whitish edges ; thighs, belly, and rump, chestnut ; the throat 

 and upper part of the neck bare of feathers, the skin membranous, 

 and loose, but furnished with a few straggling hairs ; tail green, with 



