CHERRIE". ORNITHOLOGY OF THE ORINOCO RECIOX. 313 
region, together with those in the collection of the American Mu- 
seum, convinces me that there are only two ways in which they can 
be treated logically. Either all must be lumped together under a 
single name (possibly P. c. Columbiana ) ; or, three or four distinct 
races must be recognized as inhabiting that region. 
I have adopted the latter course — my conclusions, therefore, being 
quite at \ariaiice with those of the two authors' who lia\'e most 
recently studied the F. cayana group. 
The native name of the birds of this group is Pisciia. They 
frequent the less heavily wooded districts. 
Birds from the Caura River (American Museum collection), a 
single example from the San Feliz River near its junction with the 
Cuchivero River, and British Guiana specimens are readily separable 
from the middle Orinoco birds by the darker ash grey of the breast 
and more sooty blackish or greyish of the under tail-coverts. Also 
the tail-feathers underneath are uniformly blackish with little or no 
trace of rusty shading, and the subterminal bar practically obsolete. 
Above, these birds are unif(.)rndy darker, more inclined to ba}' — with 
less ferruginous. 
Pi.WA c.AV.-\N.\ COLUMBIAN.^ (Cabauis). 
Pyrrlwcorax culiimbiamts Cabanis, Journ. f. Orn. 1862. p. 70 (Car- 
tagena). 
Piaya cayana guiancnsis Berlepsch & Hartert, p. 97. part. ( Points on 
the Orinoco; Altagracia, Caicara, Ciudad Bolivar); Hellmayr, //). 
XIII. 1907. p. 44. (Orinoco points.) 
Piaya cayana cayana Hellmayr, Novit. Zool. XIV. 1907. p. 35 (Ori- 
noco valley). 
The birds from the middle (Orinoco region — from Ciudad Pioli\-ar 
(where P. c. cayana is also found) up at least as far as the mouth of 
the Meta River — seem to me referable to this race. 
While closely related to typical cayana, they average much 
lighter in color, as pointed out in my remarks under that race ; and 
the rusty shading of the under side of the tail-feathers seems to 
afiford a ready means of separating the two races. 
Eye dark lake red, bare skin about eye carmine: bill citron yellow 
distally shading to an apple green at base ; feet plumbeous. 
