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. 
