A. Cherry Gall. B. Oak Apple ; its gall- wasp (Teras termindlis or Cynips folii) shown above, enlarged. C, Blister Gall — gall of 

 Spathcgastcr vinicatrix. D. Spangle Gall — gall of Newoterus lenticularis, shown above, enlarged. E. Marble Gall — gall of 

 Cynips Kollari, with one of the galls cut open, showing larva in its central chamber. F. Artichoko Gall — gall of Cynips 

 gemnue, with wasp shown below, enlarged. O. Gall of A euroterus fumipennis (to left of leaf), if. Currant Gall — gall of Spathe- 

 yaster baccarum, on calkins, and above on under side of leaf ; its insect below, enlarged. /. Gall of Biorhiza aptcra, on roots. 



Plate XI. 



