SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 72 NUMBER 4 



DIAGNOSES OF SOME NEW GENERA OF BIRDS 



BY 



ROBERT RIDGWAY 

 Curator, Division of Birds, U. S. National Museum 



(Publication 2588) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



DECEMBER 6, 1920 



