List of the Trisect Fauna of the Count >/. 



139 



QuERcus EoBUR, L. Bud. The well-known oak-, or King 

 Charles', apple, is a spongy textured, whitish or rosy, almost 

 spherical gall, occurring commonly on the terminal huds in 

 May and June; it varies in size, from that of a pea to a 







im 





Fig. 30. Andricus terminalis. 



medium-sized apple. The gall is many-celled, and is mature 

 early in June, when the gall-flies emerge therefrom. Andricus 

 TERMINALIS, Fabricius. (Fig. 30.) 



QuERcus EoBUR, L. Bud. This gall has the appearance 

 of a terminal swelling of the young oak shoots, but is truly a 

 bud gall, although axillar 

 buds and leaves are produced 

 from its surface. In section 

 the gall shows the surround- 

 ing woody growth, with an 

 elongate apical cavity, at the 

 base of which we find the 

 single, brown, ovate larva- 

 cell. The gall is mature 

 in spring, and the gall-fly 

 emerges therefrom in June. 

 (Fig.^31.) 



QuERcus EoBUR, L. Leaf. Small, reniform, green or red, 

 succulent, but not soft, galls, occurring on the under side of 

 the side veins and midribs of the leaf, from which, when 

 mature, they are very easily detached. They occur in 



Fig. 31. Andricus inflator. 



Andricus inflator, Hartig. 



