34 THE GRAPE-VINE LEAF-HOPPERS. 
of being, perhaps, able to check the ravages of these minute 
insects. As most persons growing grape-vines know from 
sad experience how these insects look it 1s not necessary to 
describe them in detail; the illustrations show their general 
appearance much better than words could express it. 
Four different species were found, all about the same size and 
shape, only varying in markings. The most common ones 
were the two species illustrated, of which one is Zyphlocyba 
vulneata Fitch, and the other one 7. comes Say. The former 
is a reddish-brown insect marked with white lines and dots 
and also with two prominent black lines at margins of upper 
wings; the latter is of a translucent white color prettily 
marked with red lines and prominent black spots at the tip 
of wings and two black lines at margin. The younger stages 
of both are very pale and the insects in that period are almost 
as active as the adult ones, though lacking, of course, the 
wings. They will dodge about in a most amusing way, and 
as they, like the adult ones, jump readily they are not easily 
captured: Like all insects belonging to this order they are 
active and take food as soon as born, not passing 
through an inactive pupal stage like beetles andmoths. They 
take their food by suction, hence the application of such 
poisons as Paris green or London purple is of no avail, though 
it will kill, by contact, some of the still very tender and 
younger specimens, or even adult ones while they are just 
shedding their skins and are still very soft and. unable to 
clean themselves. The only remedies that promise success 
are insecticides which kill by contact, as kerosene-emulsions, 
tobacco-teas and others. The former, to be of any use at all, 
should be applied very early in the morning, when the in- 
sects are less active than later in the day. Mr. Pettit tried 
a number of different insecticides, and his report is given be- 
low. When he investigated the vines he found that the leaves 
showed already at that early date, (May 20), considerable 
injury ; they were somewhat withered and curled, appearing 
scorched and very unhealthy. 
Report of Mr. R. H. Pettit.—During the spring and early 
summer several trips were made to Christmas Lake, and the 
following experiments were made 
