C)RNirH 



QL 

 681 



.R56 



v.m 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 50 



THE BIRDS OF 

 NORTH AND MIDDLE AMERICA 



commenced by the laie 



ROBERT RIDGWAY 



continued by 



HERBERT FRIEDMANN 



Part X 



SMITHSONIAN INSTITUTION 



WASHINGTON 



D. C. 



