58 ERITISH OAK GALLS. 



from tlieir galls so late in the spring that finding 

 the leaves too much developed they oviposit in the 

 buds of Lannnas shoots, and in due course galls may 

 be seen upon the leaves of these shoots as well as on 

 leaves of the twigs from which the Lannnas shoots 

 spring. 



A few representative examples of galls on twigs and 

 leaf-petioles in autumn-winter condition will be found 

 on Plate VII, div. A, and a fine specimen of a re- 

 curved twig, in growing condition, is illustrated on the 

 same Plate, div. B. 



Parasites and inquilines on this species are very 

 numerous. 



Parasites, Nos. 19, 21, 26, 31, 3-1, 35, 37, 42, 44, 56, 

 59, 71, 75, 78, 80, 83, 87, 96, 98, 105, 108, 115, 116, 



1 21, 146, 151, 154. 



Inquilines, Nos. 69, 109, 127, 128, 130, 136, 139. 



Andricus gemmatus, Adler. 

 (Plate V, div. E.) 



Andricus gei)imati(s, Cameron, Mosley. 



English name of gall. — "The Butt Gall." 



Position of gall. — In the leaf axils. 



Manner of growth. — Glabrous, sessile, gregarious. 



Colours. — Pale green, green, reddish-brown, Ijrown. 



Average dimensions of a mature specimen. — Height, 



2 mm. ; breadth, 1 mm. ; girth, 3 mm. 



May be sought during the months of May and June. 

 Growth is complete % the end of Jvme. 



The typical condition of the gall is unilocular and tinilarval. 

 The larva pupates in the gall. The imago emerges during 

 July and August. 



Alternate agamic generation : AjJiilothrix corticis, Linn. 



This is a very small and obscure gall, and although 

 widely distributed it is not often observed. It is more 

 or less oval in shape, sometimes narrower at the apex 

 than at the Ijase. The apex is frequently the only 

 portion visil)le, and very careful searching is necessary 



