THE GRAPE. 147 



reach the lice upon established vines, although 

 various modes are suggested. Professor C. V. 

 Riley thinks the kerosene solution poured freely 

 upon the roots will prove efficacious. Carbolic 

 acid, in the proportion of one part to fifty or one 

 hundred parts of water, poured into holes around 

 the vine has proved advantageous. Bisulphide 

 of carbon, if introduced into the soil, two to three 

 ounces to a hole, and several holes to each vine, 

 is said to permeate the soil and kill the lice, 

 without injury to the vine. It is very volatile, 

 inflammable, and explosive, and should be care- 

 fully handled. Potash fertilizers and also salt 

 are found to be useful. Sandy soils are said to 

 be less liable to have the insect. As our native 

 vines are comparatively exempt, they are recom- 

 mended as stocks upon which to graft the Euro- 

 pean varieties and the Delaware types, should 

 they become liable to attack. 



The Green Grape Sphinx. This is a large, 

 pale green caterpillar, about two inches long 

 when the larva is full grown, which is very vora- 

 cious ; a few of them being sufficient to strip a 

 vine of foliage. It is easy to see their work and 

 to destroy them. Other varieties of Sphinx and 

 large caterpillars are also found to some extent, 

 which are to be hand-picked and destroyed. 



The Beautiful Wood Nymph (Eudryas 



