28 BRITISH APHIDES. 



Apterous viviparous female. 



Oblong, green, coarsely punctured. Eyes brown. 

 Abdomen carinated. Tail short and green. Above 

 the tail there is a small horn-like process, which dis- 

 tinguishes it from 8. fosnlcuU: 



Pupa. 



Oblong, pointed behind. Glaucous green, with 

 four dark green blotches on the thorax, and a double 

 green stripe down the abdomen. Tips of wing-cases 

 and tarsi darker. 



Winged viviparous female. 



Head, band on prothorax, thorax, and a large square 

 spot on the dorsum, black or dark olive green. This 

 spot sometimes is divided into three separate, sharp 

 bars. Cornicles long, thin, and green; sometimes 

 they are dark olive. Tail small and fine. Legs yel- 

 lowish, with brown tibiae and tarsi. Wings very long, 

 insertions and cubitus fine yellow. Stigma grey and 

 scaly. Antenna black, and rising directly from the 

 vertex. The clavate character of the cornicles is 

 much less marked in some specimens than in others. 

 Rostrum reaches nearly to the second coxce. 



This insect feeds on various species of Salix. 

 Kaltenbach says that it is identical with Rhopalo- 

 siphum pastinaccce of Koch, and therefore I add 

 his synonyms, but it is with some hesitation. The 



