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



PLATE !X. 



The Grape Phylloxera in California. 



Phylloxera vitifoliae- a b, c, Adult radicicole: a, ventral view (beak shown telescoped V, 



P b !dorsal view c antenna: d,e,f, hibernant larva: d, dorsal Yiew;e ventral view^an- 



tenna- a, h, newly hatched (tirst-instar) radicicole: g, ventral view ,h, dorsal view, 



i J^econd-instar radicicole: i, dorsal view;;, antenna: fc, I, radicicole eggcorium, *., whole 



shell: I, section to show structure. 



