Bui. 903, U. S. Dept. of Agriculture. 
Plate XI 
The Grape Phylloxera in California. 
Phi/llorera vitifoUae: a, Nymph, dorsal view; b, outline ventral view of same; c, enlarged 
sensorium on antenna?; d, enlarged tubercle with spine; e, microscopic structural view of 
tubercle;/, hind leg; g, beak showing structure; h, middle leg; r, right antenna; 1, left 
antenna. 
