SMITHSONIAN INSTITUTIOlSr. 



UNITED STATES NATIONAL MUSEUM. 



BULLETIN 



OF THE 



UNITED STATES NATIONAL MUSEUM, 



N'o. 50. 



THE BIRDS 



OF 



NORTH AND MIDDLE AMERICA. 



BY 

 CURATOR, DIVISION OF BIRDS 



ART 



IV. 



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WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



19 07. 



