COLORADO EXPERIMENT STATION. 
19 
The Grape Leaf-hopper was first described by 
Dr. T. W. Harris in 1831 under the name Tettigonia 
vitis. From Dr. Harris’ Insects Injurious to Vege¬ 
tation I copy the following popular description: 
“In its perfect state it measures one-tenth of an inch in length. 
It is of a pale yellow or straw color; there are two little red lines on 
% the head; the back part of the thorax, the scutel, the base of the 
wing covers and^L broad land across the middle, are scarlet; the tips 
of the wing covers are blackish, and there are some little red lines 
between the broad band and the tips. The head is crescent-shaped 
above, and the eyelets are situated just below the ridge of the front.” 
This insect varies a considerable in coloration 
and several varieties have been described but all 
have the same habits and can be kept in check by 
the use of the same remedies. 
REMEDIES. 
The writer has never lived where the Grape 
Leaf-hopper was numerous enough to make it 
seem necessary to apply any remedy and conse¬ 
quently has had no experience in combating it. 
But from experiments conducted for the destruction 
of the Apple Leaf-hopper (. Empoasca mail) which 
is a very near relative, and a knowledge of the life- 
habits of the grape-feeding species, it is believed 
that a course of treatment can be recommended 
that will greatly lessen, if not entirely prevent its 
injuries. 
The applications that the writer has found ef¬ 
fectual in destroying the Apple Leaf-hopper are 
kerosene emulsion, whale-oil soap and pyrethrum. 
The cheapest and most effectual of these, the 
materials for which are always at hand, is kerosene 
emulsion. 
