V 



Issued May 19, 1908. 



U. S. DEPARTMENT OF AGRICULTURE. 



FARMERS' BULLETIN No. 155. 



How Insects Affect Health in Rural Districts. 



BY 



L. O. HOWARD, 



Entomulugist ami Chief, Bureau of Entomology. 



(Revised Edition. ) 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1908. 



