xlii Description of Plates. 



Fig. 8^ Galls of Andricus inflator. Section showing the inner gall 

 chamber. 



Fig. 9. Galls of Aphilotrix collaris. Fresh galls shown in the bud 

 and detached. Mature adherent galls are also shown. 



Fig. 9*. Galls of Andricus curvator on the leaf and twig. Section 

 showing the inner gall. 



Fig. 10. Galls of Aphilotrix fecundatrix, showing the inner gall 

 detached. 



Fig. ro\ Galls of Andricus pilosus { X3). 



PLATE II. 



Fig. II. Galls of Aphilotrix callidoma. 



Fig. II^ Galls of Andricus cirratus (natural size and x 3). 



Fig. 12. Galls of Aphilotrix Malpighi. 



Fig. 12". Galls of Andricus nudus (x2). 



Fig. 13. Galls of Aphilotrix autumnalis, showing the mature gall 

 detached. 



Fig. 13*. Galls of Andricus ramuli. 



Fig. 14. Galls of Dryophanta scutellaris. 



Fig. 14"'. Galls of Spathegaster Taschenbergi, at maturity after the 

 escape of the flies. One fresh gall enlarged. 



Fig. 15. Galls of Dryophanta longiventris. 



Fig. 15"^. Galls of Spathegaster similis. One on the twig, one 

 showing through the bud, and one enlarged. 



Fig. 16. Galls of Dryophanta divisa. 



Fig. i6\ Galls of Spathegaster verrucosus. One on the leaf and 

 one on the petiole. One on a leaf, and one escaping from a bud, 

 enlarged ( X2). 



Fig. 17. Galls of Biorhiza aptera. Fresh galls of the first 3'ear 

 (experimentally grown) ; beneath, a mature woody gall. 



Fig. 17*. Galls of Teras terminalis ; the lower is a mature gall in 

 section. 



Fig. 18. Galls of Biorhiza renum, with the fly magnified. 



Fig. 18*. Galls of Trigonaspis crustalis. Flies, male and female, 

 magnified. 



Fig, 19. Galls of Neuroterus ostreus. 



Fig. 19*. Galls of Spathegaster aprilinus. 



Fig. 20. Galls of Aphilotrix seminationis on the leaf and flowering 

 catkin. 



Fig. 21. Galls of Aphilotrix marginalis. 



Fig. 22. Galls of Aphilotrix quadrilineatus. 



Fig. 23. Galls of Aphilotrix albopunctata. 



