*7Q BRITISH OAK GALLS. 



The typical condition of the gall is unilocular and unilarval. 

 The larva pupates in the gall. The imago seldom emerges 

 until the spring of the second vear. 



Parasite, No. 56. Inquilines, Nos. 128, 133, 138, 144. 



Alternate sexual generation: Andricvs ramvli, Linn. 



Tliis is an obscure gall and not easy to find ; more 

 than half of it, even when full grown, is covered with 

 bud-scales. The gall collector needs to be very 

 persevering when searching for it. 



It is generally found in terminal leaf-buds, and 

 covered with a greenish succulent rind which ultimately 

 chanofes to a brownish colour and dries to a thin 

 laver, which remains on some specimens, but falls off 

 others and leaves indistinct lono-itiidinal furrows on 

 the surface of the gall. The shape is that of a prolate 

 spheroid, the lower pole of which is unattached, 

 although im])edded in the xylem of the twig, the 

 upper pole produced into a mastoid form. It matures 

 rapidly and very soon afterwards usually falls to the 

 ground. 



This gall bears a close resemblance to those of 

 Andricus collaris and A. glohidi. There are, however, 

 a few distinguishing features. In comparing it with 

 the former species Cameron says "it is shorter and 

 more spherical than the gall of collaris . . . the 

 conical point is more distinct, and there is no 

 coloured band." Mayr, referring to the same subject, 

 adds that there is much similarity between the galls 

 of ApJiilofhrix autumnalis and Andricus glohuli ; both 

 are more than half covered with bud-scales, when 

 fresh of a green colour, thin fleshy reticulation beneath 

 the scarf-skin, and a small round wart at the summit; 

 but " it differs from the gall of A. glohdi in its more 

 oval form, in the surface of the inner o-all havino- no 

 reticular rings, but blunt longitudinal striations, which 

 also show on the surface of the brown gall." 



