260 FIELD MUSEUM OF NATURAL HISTORY ORNITHOLOGY, VOL. I 



Falco sparverius Linn. 



5 specimens. Guayabo 3$, i c? ; Coliblanco icT. 

 These specimens are easily referable to the eastern form. This 

 species was common about Guayabo. 



CracidtB. 



Chamaepetes unicolor Salv. 



2 specimens. Volcan de Turrialba 2 9 . Quite common in the 

 deep heavily-wooded ravines about the volcano at timber-line. The 

 bare skin in front of the eyes is ultramarine in life. These birds are 

 favorite game birds. Their flesh is white and finely flavored. While 

 walking at the bottom of a rocky gorge densely wooded on either 

 side, I was attracted by an uncanny, indescribable sound. It might 

 have been a partridge drumming a great distance away, but it evi- 

 dently came from close at hand. At length I made out a big, black 

 bird in the shrubbery hanging from the steep side of the ravine. At 

 the report of my gun the bird fell and another flew towards me and 

 alighted a few feet away. These birds appeared to have little fear 

 of man. 



Ortalis cinereiceps (Gray}. 



5 specimens. 3cT, i 9 , i sex (?). They were common upon the 

 heavily wooded hillsides marking the course of Guayabo Creek 

 They were usually met in small bands and were quite fearless. When 

 compared with specimens in this Museum the Guayabo birds are 

 seen to possess darker heads and more richly colored breasts deeper 

 olivaceous brown. This possibly may be due to the excellent condi- 

 tion of plumage which the birds are in. The birds are known by the 

 widely-used name of Chachalaca. 



II a 11 id t^. 



Aramides albiventris plumbeicollis Zeledon. 



i specimen. Guayabo d\ Compared with a specimen from 

 Costa Rica the Guayabo bird is typical. This bird was taken by the 

 side of a tiny stream flowing down a hillside through an open forest. 

 No others were seen. 



