PLATE III. 



Phylloxera foveola Pergande, n. sp. 



Fig. 15. Mature galls — natural size. 



Fig. 16. Mature gall, vertical section- enlarged. 



Phylloxera pilosula Pergande, n. sp. 



Fig. 17. Mature galls, above and beneath —natural size. 



Phylloxera deplanata Pergande, n.sp. 



Fig. 18. Young galls, above and beneath— natural size. 

 Fig. 19. Young gall, from beneath— much enlarged. 

 Fig. 20. Young gall, from[above— much enlarged. 



