THE HOP-VINE LEAF-HOPPER. 49 
be done without much trouble, and that this would prove the best pos- 
sible remedy to prevent the spread of or damage by the aphids. 
Another enemy is the larva of a Syrphus fly, which I find in small 
numbers on the vines. ‘This larva is of a uniform yellowish-white color, 
about one-fourth of an inch in length, with a stout body tapering to the 
head. It is a slimy insect, with no perceptible legs or head, but a mere 
rounded opening for a mouth. It glues itself fast in a position where 
lice are abundant, and, stretching its head in every direction, seizes ail 
lice within its reach, and when it has cleared all within its reach moves 
on to a new center of operations. 
The lice are also attacked by a disease, apparently of a fungoid na- 
ture. I noticed several instances where all the lice on a leaf appeared 
unnaturally large or swollen, and of a brownish-yellow color. On being 
handled they crumbled into a very light brownish, granular dust. The 
disease does not appear to be widespread, and I cannot give any nearer 
details as to its nature or origin. 
THE HOP-VINE LEAF-HOPPER.* 
( Typhlocyba sp.) 
An insect known as the * green fly” is pretty generally found in hop 
yards all through the summer, and sometimes very numerous, This 
insect has been said to “sting the heads” and to cause ‘slide down” or 
‘foolish hills,” while others claim it does no damage whatever. The 
insect is of a preeraeh to yellowish color, with a short, broad head, long, 
narrow body, and two pairs of wings, the first narrow, long, and yellow- 
ish-green, with a dark dot on each, /the hind wing broad and transparent. 
The legs are yellow, the peeaat pair very long and stout, the shanks 
set with spines, and as a whole fitted for leaping. The young or imma- 
ture forms resemble the full-grown insects in all points, except that they 
want wings. They are very active, leaping off at the least disturbauce, 
and when full-grown using their wings as well as their legs to good ad- 
vantage. The adults hibernate in crevices, in barns, or wherever they 
ean find shelter, and appear in spring as soon as vegetation appears. 
They mate and breed all through the season, and become very humerous 
oceasionally. They seem to be somewhat local, as in some yards I could 
not find them at all, while in others close by they were abuudant. As 
a rule, yards badly infested with aphids had none of these hoppers, 
while Mr, Risley’s yard, which was by all odds most free from aphids, 
had these hoppers more numerous than they were elsewhere. 
These insects do not damage the hops; they are found most-.usually 
on the lower leaves (i. e., not more than 5 or 6 feet up the pole), and feed 
by puncturing one of the ribs and sucking the sap. The injury done 
by them consists in so weakening the veins that they are unable to 
* This insect is an adeaenibed species of Typhlocyba, ie the material irecsteen and submitted to Mr : 
P. R. Uhler is considered by him in too poor condition to permit of proper characterization.—0. V. R. 
8993—Bul. 4 4 
