ATTACKING THE LEAVES. 



295 



longs to the family Ceridomyia, and is known to entomologists 

 as Lasioptera vitis of Osten Sacken. 



The larvsB are liable to be attacked by a parasite, and also 



FIG. 306. 



by a species of Thrip, which invade the cells and destroy the 

 inmates. 



No. 169. The Grape-vine Apple-gall. 



Vitis pomum Walsh & Riley. 



This is a globular, fleshy, greenish gall, about nine-tenths 

 of an inch in diameter, which is attached by a rough base, 



