PLATE XX VIII. 



A bifurcated shoot of Q. pedunculata, bearing numeroiis galls caused by 

 Aphilothrix Sieholdi. most of which are partly or wholly concealed 

 beneath a thin layer of earth formed by ants. A quantity of earth 

 also fell away when the shoot was cut. 



Nearly nat. size. 



Adlard S- Son, Impr. 



