288 INSECTS INJURIOUS TO THE OR APE. 



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

 ca»e of the smoke, are the most efficient remedies. Dusting 

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

 iiave all been recommended. Carrying lighted torches through 

 tne 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 sev^eral 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 

 Fig. 298. Fig. 299. ^j^g,^^ Y\g. 298 shows this 



^ I \ y\ t^l friendly insect in the larval 



'"Ws^" XVX^\ ^^^®' ^"^ ^^^' ^^^ "^ ^^^^ P^^" 

 ^^^ feet 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. 



