LIST OF HOMOPTEROUS INSECTS. 1039 



very slender, about half the length of the body ; fourth joint about 

 half the length of the third ; fifth as long as the fourth ; sixth a little 

 shorter than the fifth ; seventh more than twice the length of the 

 sixth : abdomen with a short style at the tip : nectaries less than 

 one-twelfth of the length of the body : legs rather short. Length 

 of the body 1 line. 



a. England. (In Canada Balsam). Presented by F. Walker, 

 Esq. 



309. Aphis Betulina. 



Fuscescem ; antennce corpore breviores ; cornicula pallida, medio- 

 cria ; pedes pallidi, tibiis apice tarsisque nigricantibus ; alee 

 limpidce. 



The viviparous ivinged female. Small, brownish : feelers pale 

 towards the base, rather stout, shorter than the body ; fourth joint 

 much shorter than the third ; fifth as long as the fourth ; sixth a 

 little shorter than the fifth ; seventh about twice the length of the 

 sixth : nectaries pale, about one-sixth of the length of the body : 

 legs pale ; feet and tips of the shanks blackish : wings colourless ; 

 distance between the first and second veins more than twice farther 

 at the tips than at the base ; third very much nearer to the second at 

 the base than at the tip, as near to the second at the base as the se- 

 cond is to the first ; first fork a little nearer to the third vein than to 

 the second fork, very much nearer to the third vein than the third is 

 to the second ; second fork a little nearer to the fourth vein than to 

 the first fork ; fourth vein slightly curved, much farther from the tip 

 of the rib-vein than from the second fork. Length of the body ^ 

 line ; of the wings l^ line. 



England. 



310. Aphis superabilis. 



Obscure Jlavescens, convexa, sat lata, subelliptica ; antennce corpore 

 plus minusve breviores ; thoracis discus in alatis niger ; pedes 

 pallidi, femoribus tibiisque apice tarsisqu£ fuscis ; alee lim- 

 pidce. 



The viviparous wingless female. Dingy yellow, convex, rather 

 broad, almost elliptical : front slightly convex : feelers about half 

 the length of the body ; fourth joint much shorter than the third ; 



