SYNOPSIS OF BRITISH APHIDID^. 





I. 



Aphidinse 



fUpper wing with twice- 

 I forked cubitus; under 

 •{ wing with two oblique )■ 16. Callipterus. 

 I veins; antennae 7-joint- j 

 l_ ed . . . .J 



Lachnince 



f Upper wing with twice- 

 I forked cubitus ; under 

 ■{ wing with two oblique « 

 I veins; antennae 6-joint- 

 ledL .... 



'17. Pterocallis. 



18. Phyllaphis. 



19. Ptychodes. 



20. Lachnus. 



21. Stomaphis. 



22. Paracletus. 



23. Trama. 



24. Dryobius. 



II. 



{Cubitus once forked ; 

 lower wings with 2 

 oblique veins 



i}25. 



Schizoneura. 



III. 



Pemphiginse 



rCubitus not forked ; (f„- ^^f'V^'S^^s. 

 ' lower wings with 1 oi' ) ^7. Tetraneura, 

 2 oblique leins . ./ yoneura. 

 ^ V. Toxoptera. 



Cubitus once forked ; 

 lower wing with 1 

 . oblique vein 



j-y C Upper wing with only 3 



^1 ' • „ •< veins; under wing 



Chermesmse i - - ..' . => 



only 3 ^ 

 g with > 



Thelaxes, 



Chermes. 

 Phylloxera. 



(. 1 oblique vein 



Rhizlbiin. ] W-g^<l f--^ -^— { Sfs' 



N.B. The genera in italics are not, it is believed, represented by 

 British species. 



P^ 



o 



Vol. m. 



