PLATE VI. 



Phylloxera c.-avellana Riley. 



Fig. 32. Mature galls, from beneath —natural size. 



Fig. 33. Mature gall, vertical section— much enlarged. 



Fig. 34. Mature galls, variety — natural size. 



Fig. 35. Mature galls, variety ; above and beneath — natural size. 



Fig. 36. Mature gall, variety; vertical section— much enlarged. 



Phylloxera c.-gunimosa Riley. 



Fig. 37. Mature gall— reduced ]/>, . 



Phylloxera c.-vena Fitch. 



Fig. 38. Mature galls, from aljove— natural size. 



Fig. 39. Mature galls, from beneath— greatly enlarged. 



