156 Annals of the Carnegie Museum. 



for examination, who reports as follows : " The specimens appear to 

 be adult and immature of Urubitornis solitarius. We have one im- 

 mature bird from Guatemala, but no adult specimen. However, ref- 

 erence to Gurney, Ibis, 1876, 491 ; Salvin and Godman, Biologia 

 Ccntrali- Americana, Aves, III, 1900, 87; and Kothe, Ornithologische 

 Monatsberichte, XX, 1912, 1-5, seems to leave no doubt of this identi- 

 fication." Measurements are as follows : 



The adult fits Dr. Kothe's and Messrs. Salvin and Godman's descrip- 

 tion very well, being nearly uniform dark gray (slate-gray), with 

 faint brownish tips to the feathers of the upper parts. There is no 

 crest, but the feathers of the occiput are white at the base. The 

 remiges are indistinctly barred with paler gray, and the tail is as de- 

 scribed, the upper tail-coverts tipped with white. The young bird was 

 inadvertently identified by Dr. Allen as Geranoetus mclanoleuciis. 

 From its measurements, which agree with those given by Dr. Kothe, 

 it is probably a female. It is dark brown above, the scapulars, wing- 

 coverts, etc., mottled with lighter brown. The crown is also dark 

 brown, but the hindneck, sides of the neck behind the eye, and upper 

 back is buffy, with brown shaft-streaks, expanding to spots posteriorly; 

 the throat is buffy, below which there is an interrupted brown band 

 extending forward up to the eye on either side; the rest of the under 

 surface is buffy white, with much brown spotting, mostly terminal on 

 the feathers ; tbe tibia? are wholly brown ; tbe tail is dull brown with 

 much paler mottling, especially on the lateral rectrices; the upper tail- 

 coverts are tipped with white, as in the adult. The new feathers in 

 this plumage are all deeper brown than the others, but not slaty as in 

 the adult. The axillaries are buffy, and the remiges extensively buffy 

 white at the base beneath. 



Little is on record concerning this hawk, which is rare in collec- 

 tions. It was confused by Sharpe and other authors with Harpyhqli- 

 actus coronatus (Vieillot). It is known to range from southern Mex- 

 ico to Peru. 



1 Collection American Museum of Natural History. 



2 Collection Academy of Natural Sciences of Philadelphia. 



