786 



REPORT UNITED STATES GEOLOGICAL SURVEY. 



The Grape- Vixe Colaspis, Colaspis flanda, Lay. (Fig. 54). — Eating the terminal 

 bnds and young leaves, also riddling the leaves. A cream-colored and black beetle. 



This little beetle is one of the worst of the forty or fifty different insect- 

 enemies of the grape-vine. 

 The beetle ranges from New 

 York to Illinois and Missouri. 

 It is cream-colored and black, 

 with long club-shaped feelers 

 '^ nearly a fifth of an inch long ; 

 the head and prothoray are red- 

 dish-yellow, while the wing- 



FlG. 54.— Grape-Vine Colaspis. 2 nat. size ; 1, covers are black. Hand-pick- 

 the same magnified ; a, the larva; b, end of body jug jg the best remedy. The 

 enlarged. (After Riley.) j^^.^^^ ^p-^^ 57 ^^ ^^^ ^^^^ 



found by Professor Riley to feed on the roots of the strawberry. It 

 transforms in the ground. 



The Vine-Leaf Hopper, Erythionenis viiis Harris. (Fig. 55). — Swarming upon the 

 leaves in August and early September ; a small, paleyeUow leaf-hopper, with two broad 

 red bands on the wings, causing the leaves to wither. 



This little insect, which I have seen abounding in the vineyard of 



the Massachusetts Agricultural 

 College early in September, when 

 the grapes were ripening, is pale 

 yellow, with two broad red bands 

 and a third dusky one at the 

 apex. It is a little over a tenth 

 of an inch long. It swarms on 

 the leaves in August, puncturing 

 them with its tiny beak and draw- 

 FiG. 55.^Vine-Leaf-Hopper. ing out the sap until the leaves 



turn yellow and become dry and stiff. The young appear in June, and 

 the leaves are thus depleted for a period of nearly three months. They 

 wither, and hence the i^lant becomes enfeebled, little new wood is formed, 

 the canes do not ripen well, and the fruit is stunted and easily mildews, 

 while in a few years the vines become exhausted and barren. The leaf- 

 hoppers hibernate, and lay their eggs in the spring. As a remedy, wash 

 the vines with soap-suds in June, and, if possible, fumigate the leaves 

 "with tobacco. 



The Red-Shouldeeed Sinoxylon, Sinoxylon hasiUare Lay. (Fig. 56). — Boring under 



the bark and into the middle of grape-stems ; 

 a short, thick maggot. 



This blight insect sometimes bores 

 under the bark of the grape, as well 

 as in the heart of grape-stems. It also 

 tunnels in apple-trees and in the shag- 

 bark hickory, boring holes straight 

 toward the heart of the tree, and 

 changing to the pupa state at the 

 inner ends of their burrows. (Harris.) 

 As a remedy, burn the infested twigs 

 or stems. 



Fig. 56. — Red shouldered Sinoxylon. a, 

 larva; 6, pupa; c, beetle. (After 

 Riley.) ' 



