126 BRITISH OAK GA^LLS. 



prominent than that of the species now described, and 

 the furrows on the niesonotum are much shallower 

 and shorter (Bignell, Lc). 



" Bred by Mr. Bignell from oakbuds which apparently 

 were not expanded or distorted. 



" The inquiline is StTphi/lotus connatus. Plymouth." 



Spathegaster albipes, Schenck. 

 (Plate LI.) 



Spathegaster cdhipes, Mayr, Fitch, Liclit., Scliltdl., Adler ; 

 Nettroteriis alhipes, Cameron. 



English name of g:all. — " Sclieuck's Grail." 



Position of g-all.— Ou the margin of the leaf and on the 

 mid-rib. 



Manner of growth. — Single, solitary, sessile, oviform, slightly 

 pilose. 



Colours. — Yellowish-white, greenish-yellow, pale brown. 



Average dimensions of a mature specimen. — Length, 

 2 mm. ; breadth, 1mm. 



May be sought during the months of April to June. 



Growth is complete hy 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. 



Inquiline, No. 128. 



Alternate agamic generation : Neuroierus Ixvinsculus, 

 Schenck. 



Several writers are of opinion that this gall is 

 indistinguishable from other galls of similar shape and 

 size. 



In various features it coincides with those of 

 Andricus nudus, A. gemmatus, A. circulans ; and a 

 continental species, Andricus Imrriundus. The imago, 

 also, does not possess any definite characters whereby 

 it can be separated. 



Cameron appears to have been the first to record 

 this species as British. He found many specimens in 

 the neighbourhood of Grlasgow. 



It noAv appears to be generally distributed through- 

 out Britain. 



