Issued May 24, 1911. 



U. S. DEPARTMENT OF AGRICULTURE 

 BIOLOGICAL SURVEY— BULLETIN No. 37 



HENRY W. HENSHAW, Chief 



FOOD OF THE WOODPECKERS OF THE 

 UNITED STATES 



BY 



F. E. L. BEAL 



Assistant, Biological Survey 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1911 



