I 



Fbbbuart 19. 1920 Vol. VII. pp. 45-47 



PROCEEDINGS 



OF THE 



NEW ENGLAND ZOOLOGICAL CLUB 



TWO NEW AMERICAN HAWKS 



BY OUTRAM BANGS AND THOMAS EDWABD PENARD 



The subspecies of Accipiter superdliosus and of Elanus 

 leucurus, here described as new, were first noticed by us while 

 we were identifying the hawks of the Lafresnaye Collection and 

 making comparisons with material in the Museum of Com- 

 parative Zoology and the collection of Thomas E. Penard. 



Later, through the kindness of Dr. Charles W. Richmond, 

 Dr. Frank M. Chapman, and Mr. W. E. Clyde Todd, we bor- 

 rowed the skins of these two species contained in the United 

 States National Museum, the American Museum of Natural 

 History, and the Carnegie Museum, which gave us, in all, a 

 very fine suite of specimens. 



Accipiter superciliosus exitiosus subsp. nov. 



Type, M. C. Z., no. 120,776, young adult male; Costa Rica: Carrillo, 

 13 May, 1907; coUected by C. F. Underwood. 



Suhspecific characters. — Similar to Accipiter superciliosus superciliosus 

 (Linn6), but slightly smaller, and darker in general coloration. The dusky 

 bands of the under parts, in both sexes, much broader and more distinct, 

 and, in the male, blacker, less grayish. Upper parts blacker, less suffused 

 with dark gray. 



