288 INSECTS INJURIOUS TO THE GRAPE. 



where the vines can be enclosed, so as to prevent the free es- 

 cape of the smoke, are the most efficient remedies. Dusting 

 with lime, sulphur and lime, hellebore and Cayenne pepper, 

 have all been recommended. Carrying lighted torches through 

 the vineyard at night, the foliage at the same time being dis- 

 turbed with a stick, will destroy a great many of them, since 

 they fly to the light and are burnt. As a preventive, the 

 ground in the neighborhood of the vines should be kept thor- 

 oughly clean, and be several times raked or otherwise dis- 

 turbed late in the autumn and early in the spring, so as to 

 expose any concealed insects to the killing influence of frost. 

 A species of bug known as the Glassy-winged Soldier-bug, 

 Campyloneura vitripennis Say, feeds on these leaf-hoppers, 



and devours large numbers of 



i* f)Oft TTrn OQQ ^ 



friendly insect in the larval 

 state, and Fig. 299 in the per- 

 fect condition. This useful 

 friend, whenever seen, should 

 be protected. In both figures 

 the insect is magnified, the lines 

 at the side showing the natural 

 size. The mature insect is of a pale greenish-yellow color, 

 the head and thorax are tinged with pink, and the upper 

 wings are transparent and ornamented with a rose-colored 

 cross. 



The Grape-leaf Gall-louse. 



Phylloxera vitifolia Fitch. 



This has been already treated of under the grape phyl- 

 loxera, No. 125. 



Tree-hoppers. 



Several insects may be grouped under this name which at- 

 tack the leaves of the vine, and some of them the succulent 

 branches also. 



