* * 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ENTOMOLOGY— BULLETIN No. 85, Part VI. 



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



PAPERS ON CEREAL AND FORAGE INSECTS. 



CONTRIBUTIONS TO A KNOWLEDGE OF 

 THE CORN R00T : APHIS. 



BY 



R. A. VICKERY, 



Agent and Expert. 



Issued July 12, 1910. 



.■■swi»an.toaA^ 





WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1910. 



