64 BRITISH OAK GALLS. 



the mature state it is an attractive and interesting 

 object. 



The exterior of the gall bears several ridges of 

 irregular outline which may, or may not, encircle the 

 growth. From these ridges, at different points, buds 

 develop in the autumn and remain until the following- 

 spring, when most, if not all, become abortive and fall 

 off; if one remains a long slender twig may sprout 

 from it. I have seen several specimens in which the 

 termination of the twig bore a gall of the same 

 species. 



After the imago has emerged the outer gall continues 

 growing until the autumn — an unusual feature in 

 spring galls. 



In the centre of the structure is a deep cylindrical 

 hole. It is about 3 mm. in diameter and 10-12 mm. 

 deep. At the bottom is the elongate-oval larval and 

 pupating chamber. An exceedingly thin septum, 

 slightly pilose on the interior, closes the mouth of the 

 hole. 



" Gurvator, it may be noted, forms terminal swellings 

 like those of inflator ; but these are seldom so elongated, 

 and the internal cavity is larger and more particularly 

 wider" ('Brit. Phyto. Hymen.,' vol. iv, p. 82). 



Andricus lucidus, Mayr. 

 (Plate V, div. F.) 



Cynips lucida, Hartig; Aphilofhrix lucida, Mayr, Hartig ; 

 Andricus Jncidus, Cameron; A. lucida, Mosley. 



English name of gall. — " The Bristly GralL" 



Position of gall. — In the axils of the leaves. 



Manner of growth. — Sessile, hirsute, single, clustered, in- 

 deciduous. 



Colours.- — Pale brown, ultimately brown. 



Average dimensions of a mature specimen. — Grlobular 

 form ; girth, 30 mm. 



May be sought during any month of the year. 



Growth is complete l)y the end of September. 



The typical condition of the gall is plurilocular, but unilarval. 

 Usual numl)er of cells, about fifteen. 



