Bui. 11 0, Bureau of Entomology. U. S. Dept. of Agriculture. 



Plate II. 



Fig. 1.— Stand on which Rearing Experiments were Carried Out in Rearing the 



Spring Grain-Aphis. (Original.) 



Fig. 2.— Area on Grounds of the United States Department of Agriculture, 

 at Washington, D. C., where the Spring Grain-Aphis Usually Occurs on 

 Bluegrass in Excessive Abundance During Summer. 



The area infested is indicated by a +. (Original.) 



