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



Plate I. 



The Grape Leafhopper. 



The five nymphal stages and adult of the grape leafhopper ( Typhlocyba comes): a, First stage; 

 b, second stage; c, third stage; d, fourth stage; e, fifth stage; /,' adult with wings spread. All 

 greatly enlarged. (Original.) 



