144 



FO 1H^:8T KN 'V( ) M ( ) LOG Y. 



season they may be found in the Midlands about the end of May/ 

 l)ut more eommoidy in ihi; middle of dune. At the sanic! .season of 

 the year as we hnd th(^ sjiangh; j^'all, two or three other sjiecies of 

 Neuroterus may lie found. 



2. NlCUHOTKHUS FUMIIMCNNTS (Htff.) 



(lall on the under side of oak leaves, (;ireular in outline, smaller in 

 si/,e and brij^htiir in colour than the s])angle gall (lig. l'.j~>) ; but the 

 ]irineipal difference is that the spangle gall is ral^nd in the centie and 



Fi;,'. i:;c,.— r,V///K .;/«i.aMi<-visUT tncolor. 

 (DiHwn hy P. J. JJrown.) 



the outer edge lying Hat on the leaf, wliereas the species in question 

 has the outer edge of the gall raised and slightly depressed in the 

 centre. Thus tlu^ iudivicbial galls somewhat resemble a saucer. 



According to Adlcr, larval development does not begin until March 

 (by the time Neuroterus Umlicidaris has liatched), and the flies appear 

 about the end of May. The same authority says this fly is easily 

 distinguished from all the other species of Neuroterus. Size 2 mm. 

 Thorax dull black ; base of abdomen orange ; legs, including the 

 femora, orange ; wings, especially at the tips, smoky. 

 1 May 27, 1895, in Cheshire. 



