DESCRIPTION OF PLATES^ 



PLATE I. 



Fig. I. Galls of Neuroterus lenticularis. 



Fig. I*. Galls of Spathegaster baccarum, on the leaf and flowering 

 catkin. 



Fig, 2. Galls of Neuroterus laeviusculus. 



Fig. 2'"'. Galls of Spathegaster albipes (x2). 



Fig. 3, Galls of Neuroterus numismatis, one gall enlarged. 



Fig. 3"*. Galls of Spathegaster vesicatrix, one gall enlarged. 



Fig. 4. Galls of Neuroterus fumipennis. 



Fig. 4"^. Galls of Spathegaster tricolor. 



Fig. 5. Galls of Aphilotrix radicis. One in the fresh state, the other 

 in section, after maturity. 



Fig. 5*. Galls of Andricus noduli. One shoot bears the fresh galls, 

 the other the galls of the previous year. 



Fig. 6. Galls of Aphilotrix Sieboldi. On one stem the galls are 

 fresh, on the other mature and woody. 



Fig. 6". Galls of Andricus testaceipes. 



Fig. 7. Galls of Aphilotrix corticis. One portion of the bark exhibits 

 the fresh, the other the mature galls. 



Fig. 7». Galls of Andricus gemmatus, showing the holes through 

 which the flies have emerged. 



Fig. 8. Galls of Aphilotrix globuli. The woody inner gall shown 

 at maturity. 



^ The galls were drawn from fresh specimens by Herr O. Peters, 

 Gottingen. 



