Bui. 903, U. S. Dept. of Agriculture 



Plate X. 



J& 



The Grape Phylloxera in California. 



Phylloxera vilifoliae; a, b, c, Third-instar radicicole; a, dorsal view; 6, ventral view; c, left 

 antenna; d, e,f , prenymph (third Lnstar of winged form); d, dorsal view; e, ventral view; 

 /, left antenna; g-j, fourth-instar radicicole; g, dorsal view; h, left antenna: i, ventral view 

 (beak shown telescoped);;', beak. 



