122 THE ENTOMOLOGIST. 



to have confounded this species with Spatliegaster tricolor 

 [I.e. p. 147), The only oak spangles I have ever met with 

 on the upper side of the leaf have belonged to this species. — 

 E. A. Fitch. 



65. Neiiroferus loiviusculus, Schenck (N. pezizce/ormis, 

 Schlechtendal). — Both insects and galls from both authors 

 lie before me, so that I am in a position to judge of their 

 identity. This gall only differs from the above-mentioned 

 species, viz., N. lenticiilaris, as follows — that it is smaller, 

 and is more sparsely covered with hairs. It sometimes may 

 be found on the upper side of the leaf. In all the examples 

 I have now at hand there is in the middle a more or less 

 well-defined boss, w^hilst in the gall of A^^. lenticiilaris no 

 distinct boss occurs ; its margin is often upturned, through 

 which it sometimes becomes difficult to distinguish it from 

 the gall of Fumipennis. Schlechtendal states that the fallen 

 galls are stout above, but only very slightly arched below, 

 but the fallen galls received from him — those showing the 

 exit hole of the fly — and those from Von Heyden, in his 

 opinion Schenck's type, are both as stoutly arched on the 

 under side as on the upper; at all events yet wider observa- 

 tions are necessary to accurately differentiate the three last 

 species of galls. Herr v. Schlechtendal bred the gall-flies at 

 the end of February (Schlechtendal has it " ende Januar "), 

 from typical galls kept in a hot room. — G. L. Mayr. 



For my first authentic acquaintance with the closely-allied 

 galls of this species I have to thank Miss E. A. Ormerod, 

 who kindly sent me specimens from Kew (Surrey) and called 

 my attention to their specific value ; since then I have recog- 

 nised specimens both in Essex and Suffolk, and when the 

 difficulties of discrimination are surmounted I have no doubt 

 it will be found to be generally distributed ;* I had previously 

 considered the galls to be immature lenticularis. The 

 following may help to identify the three species : — Suppose 

 we take the nearly flat, deflected, brown pubescent galls of 

 Lenticularis as the type ; now from these Fumipennis may 

 soon be learnt to be distinguished, but the difference is hard 

 to depict without the galls themselves: however, Fumipennis 

 differs much from the type species, both in colour and shape ; 



* Mr. Rothera has met with these galls in the neighbourhood of 

 Nottiughaiu. — E. A. F. 



