Bui. 85. Part VI, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate V. 



Mas 







Fig. 1.— Damage to a Field of Corn in Indiana in 1903 by the Corn Root-Aphis 

 'Aphis maidi-radicis". (Original. 



Fig. 2.— Same Field a Year Later, Showing the Effect of Applying Barnyard 



Manure. (Original. > 



