SMITH^OlsriAN INSTITUTION. 



UNITKD STATES NATIONAL MUSEUM. 



BULLETIN 



OF THE 



UNITED STATES NATIONAL MUSEUM. 



No. 50. 



THE BIRDS 



OF 



NORTH AND MIDDLE AMERICA. 



CURATOR, DIVISION OF BIRDS. 



Part VIII. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1919. 



