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SUMMARY. 
This louse makes its appearance only in spring, and attacks cu- 
eurbitaceous plants generally, soon after they commence to grow, 
sometimes killing them at once. It continues its depredations upon 
all species of this order until frost kills the vines in fall, but prefers 
muskmelons to watermelons, and the latter to cucumbers. <A root- 
form also occurs, but with unknown effect. The species is subject 
to the attacks of the usual enemies, which greatly interfere with its 
ravages, and often suspend them. The eggs are laid in autumn, 
apparently by preference upon the same_ ground where the 
adults developed. It is therefore prudent to destroy the old vines, 
and to avoid planting melons, cucumbers and squashes upon the same 
ground two years in succession. 
Road dust, pyrethrum powder, tobacco smoke blown under the edge 
-of a sheet or canvass covering, a weak mixture of kerosene and 
water (not over one part to twenty) are all more or less effective 
for their artificial destruction; but if their natural enemies are seen 
to be very numerous, the probabilities are that the lce have about 
finished their course for the season and had better be left unmo- 
lested. Whatever artificial application is made, care should be taken 
to shake the vines and leaves to drive away the winged parasites, 
which might otherwise be sacrificed with their hosts. 
