THE LEAF-HOPPER OF THE VINE. 507 



every day or two during the time that the eggs are 

 deposited, the females will be prevented from laying 

 (Harris). 



(8) The Leaf-hopper of the Vine — Tettigonia vitis: 

 Harris. This little hopper is about one-tenth of an 

 inch in length. " Its color is generally pale yellow. 

 The back part of the thorax, the scutel, the base 

 of the wing-covers, and a broad band across the 

 middle, are scarlet. The tip of the wing-covers are 

 blackish, and some little lines between the broad 

 bands and the tips, red." They live on the under 

 surface of the leaves. In the larva state they feed, 

 upon the juices of the plant, drawn through its 

 leaves. The effect upon the vine is that the sap- 

 flow is reduced, the vine becomes weak, the foliage 

 yellow, and production prevented. 



In August the insect arrives at maturity, but still 

 sucks the sajD, and on the approach of winter hides 

 in any material which will give it shelter. After 

 the deposition of its eggs in the spring, it dies. 

 The only means by which it can be completely 

 destroyed is by using a little tent, which is spread 

 over the affected vine, and filled with tobacco- 

 smoke. The tent should be tight, to prevent its 

 escape [Fitch). 



(9) Bomhyx grata: Fabr. These attack and de- 

 vour the foliage ; not only the leaves, but also the 

 stalks. They are solitary in their habits. They 

 disappear before the first of September. The cater- 



