228 HEMIPTERA. 
their motions from place to place ; and when the leaves 
are agitated, they leap and fly from them in swarms, but 
soon alight and begin again their destructive operations. 
The infested leaves at length become yellow, sickly, and 
prematurely dry, and give to the vine at midsummer the 
aspect it naturally assumes on the approach of winter. But 
this is not the only injury arising from the exhausting punc- 
tures of the vine-hoppers. In consequence of the interrup- 
tion of the important functions of the leaves, the plant itself 
languishes, the stem does not increase in size, very little new 
wood is formed, or, in the language of the gardeners, the 
canes do not ripen well, the fruit is stunted and mildews, 
and, if the evil be allowed to go on unchecked, in a few 
years the vines become exhausted, barren, and worthless. 
In the autumn the vine-hoppers desert the vines, and retire 
for shelter during the coming winter beneath fallen leaves 
and among the decayed tufts and roots of grass, where they 
remain till the following spring, when they emerge from 
their winter-quarters, and in due time deposit their eggs 
upon the leaves of the vine, and then perish. 
As the vine-hoppers are much more hardy and more 
vivacious than the European vinc-fretters or plant-lice, the 
applications that have proved destructive to the latter are 
by no means so efficacious with the former. Fumigations 
with tobacco, beneath a movable tent placed over the trel- 
lises, answer the purpose completely.* They require fre- 
quent repetition, and considerable care is necessary to pre- 
vent the escape and insure the destruction of the insects; 
circumstances which render the discovery of some more 
expeditious method an object to those whose vineyards are 
extensive. 
There is another little leaf-hopper that has been mistaken 
for a vinc-fretter or Thrips, though never found upon the 
grape-vine. It lives upon the leaves of rose-bushes, and is 
* See Fessenden's “ New American Gardener,” p. 299, for a description of die 
tent and of the process of fumigation. 
