Andricus ramuli. 59 



receive a preference because they are larger and 

 develop earlier. This fly lays a multitude of eggs 

 in the same bud, and sometimes bores round the whole 

 periphery of the bud, so that later a large number of 

 eggs are found within, each separate, but all packed 

 closely together. The eggs are laid either on the leaves 

 or on the anthers. I have not reared flies from the 

 resulting gall myself, but have ascertained that they 

 belong to the sexual generation oi Aphilotrix autumnalis, 

 that is Andricus ramuli. 



[The autumn gall is found in October on Ouercns sessiliflora and 

 Q. pubescens. 



Inquilines. Synergists nervosus, S. variolosus, S. ruficornis, and 

 S. apicalis. 



Parasite. Mcgastigmtis dorsalis.'] 



13a. Andricus ramuli. L.^ 



Gall. This gall, which very frequently developes from 

 the male flower-buds but occasionally from the leaf- 

 buds, resembles a ball of cotton-wool and varies in size, 

 the size depending on the number of single galls in the 

 conglomeration. On transverse section we find an 

 aggregation of small oval galls 2 mm. long, each of which 

 bears a very long tuft of pale yellow hair. These hairs 

 are interwoven so as to resemble a thick white felt and 

 this gives the gall a very dainty appearance. (Fig. 13^.) 



The fly emerges in the first half of July. 



Fly. 2 mm. long ; entirely yellow, with the sutures of 

 the thorax somewhat darker ; in the female the back of 

 the abdomen is brown, in the male black ; the antennae 

 and legs are uniformly yellow. 



[' Teras ameniorum, Htg. Cynips quercus-ranntli, L,] 



