494 



PROCEEDINGS OF THE ACADEMY OF 



which is so marked a feature in the young of 31. ruficollis. "While 

 " les plumes blanches qui composent cette bland cervicale sont 

 terminees de noir ; le sommet de la tete et de Voysiput sont noirs ; 

 le dos, le croupion et les ailes d'un brun sombre, et les rerniges 

 rayees de noirdtre" is a description which will scarcely apply to 

 any specimens we have seen. The bird is unmistakably a Micras- 

 tur, but that it is undoubtedly this species we are by no means 

 convinced. 



The following specimens, in the collection of Mr. Osbert Salvin, 

 have been examined and measured : 



Wing. 



Tail. 



Cul- 

 men. 



Tarsus. 



Middle 

 toe. 



Adults. 



Bahia 



Plumbeous phase. 



Rufous phase. 



Bahia . 

 Rio Janeiro 



1.15 

 1.15 



1.18 

 1.20 

 1.15 



Young. 



6. MlCRASTUR PELZELKI, UOV. Sp. 



Micrastur pelzelni, Ridgway, MSS. 

 Sp. Char. Wing longer than the tail ; tail crossed by 3 light 

 bars, including the terminal one. Adult % (in collection Osbert 

 Salvin, Jarayacu, Upper Uca3 r ali, Peruvian Amazons, August 2 

 18C)5; E. Bartlett): Above uniform continuous dark plumbeous 

 Tail darker, narrowly tipped with white, and crossed I)}- two nar 

 row bands of dull brownish-gray, becoming white on the inner 

 webs. Side of head and neck plumbeous-gray ; throat light graj 

 Rest of lower parts white, everywhere marked with very narrow 



