Bui. 111, Bureau of Entomology, U. S. Dept of Agriculture. 
Plate IV. 
Fig. 1.— Hopvines Severely Injured by the Hop Aphis, and Left in the Field. 
(Original.) 
Fig. 2.— Enlarged View of Damaged and Moldy Hopvines. (Original.) 
INJURY TO HOPVINES BY THE HOP APHIS. 
