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PLATE V. 



-4i, The Spangle Gall, or Gall formed by Neurolerus lenticularis, the parthenogenetic 

 generation of the fly which, in its alternate sexual generation, produces the Currant 

 Gall, A 2 ; B lt the Root Gall formed by Biorhiza aptera, the parthenogenetic generation 

 of the fly which, in the alternate sexual generation, produces the Oak Apple Gall, B 2 ; 

 Ci, the Artichoke Gall produced by Aphilotrix fecundatrix, the parthenogenetic genera- 

 tion of the fly which, in its alternate sexual generation, produces the Hairy Catkin 

 Gall, C 2 . 



