U. S. DEPARTMENT OF AGRICULT1 



BUREAU OF ENTOMOLOGY— BULLETIN NO. 89. 



L. O. HOWARD. Entomologist and Chief of Bureau. 



r: ;: c , 

 * JUN2I 1910 • 



PREVENTIVE AND REMEDIAL imTHv 

 AGAINST MOSQUITOES. 



BY 



L. O. HOWARD, Pit. D. 



Chief of Bureau. 



Issued .Tune 20, 1010. 



WASHINGTON: 



GOVERNMENT PRINTING OFFI0B, 

 1910. 



