32 



THE ENTOMOLOGIST. 



the ragged rim. It is about 1 centimetre high, and has at the 

 top of the rim of the cup a diameter of 6 to 8 milhmelres. 

 The under woody half of the upper empty cup is filled up, 

 and contains some larva-cells. Dr. Giraud says, in his 

 ' Signalements,' that he only found one larva-cell; but the 

 smallest mature gall now before me contains more. Below 

 this chamber a conical swelling rises in the cavity of the gall, 

 at the bottom of the cup. When the gall is not fully matured 

 only half of the cup shows, as you could imagine a vertical 



Figs. 79 & 80. — Galls of A. ccstivalis (to the right, at foot, an iniperfeotly- 

 developerl gall; and to the left, above, a specimen in vertical section). 

 Galls of ^. grossularicc (and in section). 



section of it: this bears a great resemblance to a scale of a 

 fir-cone ; at the bottom of this the germ of the larva-cell is to 

 be found. The gall-fly appears at the end of June and in 

 July.— G. L. Mayr. 



We now come to the calkin-galls. If we reckon the calkin 

 specimens of S. baccarum , which has already been described 

 amongst the leaf-galls (Entom. x. 206), there are len species 

 known lo gall the oak flowers: two of these, this and the 

 one next described, are confined to the Turkey oak. Hence 

 it is not likely this gall occurs in Britain, although Mr. 

 Cameron took an Andricus, near Loch Lomond, on May 



