68 BRITISH OAK GALLS. 



Average dimensions of a mature specimen. — Length, 

 2 mm. : lu'eaclth. To mm. : girtli, 4'o mm. 



May be sought during the months of May and June. 

 Growth is complete bv the end of May. 



The typical condition of the gall is unilocular and unilarval. 

 The larva pupates in the gall. The imago emerges during June. 



Alternate agamic generation : A2jhiIothrixfecunc1atrix,Adier. 



This pretty little gall, altliougli very similar in size and 

 shape to Andricns nudus, differs from it in being 

 thickly covered with whitish hairlets; it is also more 

 or less solitary in its manner of growth. 



It is fonnd mostly on Q. peduncidaia ; " the reason 

 for A. fecHudatrix preferring" (to oviposit in the 

 catkins of) " this species of oak is j^robably becanse it 

 flowers about fourteen days earlier than Q. sessiliflora '* 

 (Adler, 'Alternating Generations,' p. 50). 



Andricus ramuli, Linn. 

 (Plate XIV.) 



Cynips qiiercus-ramuU, Linn; Teras amentorum, Hartig; Andricus 

 ramvli, Schenck, Adler, Licht , Mayr, Miiller, Fitch; Cynips rcnmdi, 

 Cameron, Marshall, Mosley. 



English names of gall. — "The Woollv Gall," "The Cotton 

 Gall." 



Position of gall. — On the staminate catkin. 



Manner of growth. —Hirsute, gregarious, conglomerated, oval. 



Colours. — Green, dark green, yellowish-broAvn. 



Average dimensions of a mature specimen. — Length, 

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



May be sought during the months of May and June. 



Growth is complete hy the end of June. 



The typical condition of the gall is plurilocular, l)ut unilarval. 

 Usual numljer of cells, aliout twelve. 



The larva pupates in the gall. The imago emerges during 

 Julv and August. 



Parasites,' Nos. 21, 23, 45, 62, 64. 104, 154. Inquilines, ll^os. 

 17, 130, 136. 



Alternate agamic generation : Apliilothrix auhimnalis, Hartig. 



This gall was observed in England l^y Dr. Sir 

 Thomas Browne, and mentioned by him in corres- 

 pondence with Dr. Merrett in 1668 (see Introduction). 



