CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. 357 
PiPiLE CUMANENSIS (Jacquin). 
Crax cumanensis Jacq., Beytr. 1784. p. 25. 
Pipile cumanensis Berlepsch & Hartert, p. 121. 
Native name Guacharaca. Common 011 the upper river from above 
the falls of Maipures onward. 
Female (No. 11876 Cherrie Coll.) 
Eye chestnut brown; bill slate black at tip and pearl blue from 
anterior point of nostrils and gonys to base, where the color blends 
with the pale pearl grey of the bare skin on side of the face ; feet 
bright brick red. Chin and upper throat azure blue, the color darkening 
to slate black on lower part of bare neck and on the wattles. 
The nesting season probably begins in February as a female shot 
February 17, 1899, was laying, as indicated by the active condition 
of the ovaries. 
The Guacharacas like the Paiijis are much sought after by hunters. 
TETRAONIDAE— PARTRIDGE, QUAIL, ETC. 
Odontophorus gujanensis (Gmelin). 
Tetrao gujanensis Gm., Syst. Nat. I. 1788. p. 767. 
Odontophorus (/ujatiensis Berlepsch & Flartert, p. 121. 
Not observed by the writer, but recorded by Berlepsch and Har- 
tert from Suapure on the Caura River. 
Eupsychortyx sonnini (Temminck). 
Perdix sonnini Temm., Hist. Nat. Gen. Pig. HI. 181 5. p. 451. 
Eupsychortyx sonnini Berlepsch & Hartert. p. 121. 
Native name Perdiz. Common everywhere throughout the savanna 
regions of the lower and middle Orinoco, but not observed above the 
falls. 
OPISTHOCOMIDAE— THE HOATZIN. 
Opisthocomus hoazin (Miiller). 
Phasianus hoazin Miill., Syst. Nat. Supplement, 1776. p. 125. 
Opisthocomus cristatus Berlepsch, Ibis 1884. p. 440 (Angostura). 
Opisthocomus hoazin Berlepsch & Hartert, p. 122. 
Native names Guacharaca de Ai^na, Chinchena. Common 
along: the ihicklv wooded banks of the Orinoco and its tributaries 
