154 
THE STUDY CF INSECTS. 
vine Leaf-hopper, Erythroneura vitis (E-ryth-ro- 
( 4 neu'ra vi'tis), is a well-known pest that infests the 
leaves of the grape. It is about one-eighth inch 
W in length, crossed by two blood-red bands, and a 
un third dusky one at the apex. It is often improp. 
& erly called the “ Thrip” by grape-growers. But 
^ J the term Thrip or better Thrips should be restricted 
to members of the order Physopoda. The Rose 
¥l cicaduFa Leaf-hopper, Empoa rosce (Em'po-a ro'sae), is also a 
(FromThe well-known pest, as it often swarms on the leaves 
Reporter °f roses, doing great damage. Its presence is 
l879 ) usually indicated by numerous white cast skins 
adhering to the lower side of the leaves. 
The leaf-hoppers can be destroyed by a strong solution 
of soap, or with kerosene emulsion. In vineyards, where the 
use of these substances would injure the fruit, they can be 
trapped by two persons carrying a screen covered with 
tarred paper on one side of a row of vines, while a third per¬ 
son walking on the other side of the row frightens them 
from the vines on to the screen. Dead leaves and other 
rubbish, among which these insects hibernate, should be 
burned during the winter. 
Family Membracid^e (Mem-brac'i-dae). 
The Tree-hoppers . 
Nature must have been in a joking mood when tree- 
hoppers were developed, for these little creatures are most 
Fig. 190.—Tree hoppers. 
