36 
Colorado Experiment Station 
Fig. 28.—Grape Leaf-hopper; a, adult female; b, adult male; c, another form of the 
species, showing variation in markings; d, newly-hatched nymph; e, last stage nymph; f, 
appearance of injured leaf; g, cast pupa skins, a-e, much enlarged; g, less enlarged; f, re¬ 
duced. (After Marlatt, U. S. Dep’t. of Agr. Div. of Entomology.) 
Fig. 29.—Eight-spotted Forester; a, larvae; b, one segment of body of larva enlarged; 
c. moth. Natural size, except b. 
Remedies .—The arsenicals (2-4-5) will be found effective. In 
small vineyards hand picking might be found practical. 
This insect also attacks the Virginia Creeper. 
Cottony Seale .—See under Maple. 
SHADE TREE PESTS 
Cottony Maple Scale .—This insect winters over as partly grown 
brown scales on the smaller limbs and twigs. With the coming of 
sjTiing the insect grows and throws out a white cottony secretion from 
the posterior end of the scale. During June, a mass of small creamy- 
white eggs are deposited in the cotton under the old scale. At this 
lime the scales are very conspicuous. The eggs hatch during the last 
of June and early July and the young lice locate on the under side of 
the leavelsi. This is a common pest of the maple, and also infests black 
locust, elm, and many other trees and shrubs. See Fig. 30. 
