338 FOREST ENTOMOLOGY. 



Fig. 312 is a representation of the winged form. 

 My observations of this insect were made in Cheshire, where it 

 was quite harmful. I have never found it in north Northumberland, 



Fig. 312. Winged fen m of Phylloxera punctata. 



but it is often met with in the south of the county, just on the borders 

 of Durham. 



References to Literature consulted. 



Buckton, G. B. Monograph of British Aphides. Ray Society. 

 Judeich und Nitsche. Forstinsektenkunde. 

 Nussliu. Leitfaden der Forstinsektenkunde. 



