﻿Bui. 19, U. S. Dept. of Agriculture. 



Plate II. 



Fig. 1 .—Cages Used for Rearing the Grape Leafhopper, at Laboratory, North 

 East, Pa., 1912. (Original.) 



Fig. 2.— Steam-Engine Power Sprayer Used in Spraying Against the Grape 

 Leafhopper, North East, Pa., 1912. (Original.) 



THE GRAPE LEAFHOPPER. 



