xxxvi Mr. F. Walkers 



Aphis conviva. 



The wingless viviparous female. — The body is oval, short, convex, yellow : the an- 

 tennae are dull yellow, black towards the tips, and much shorter than the body : the 

 rostrum is pale yellow ; its tip and the eyes are black : the tubes are pale yellow with 

 black tips and about one-tenth of the length of the body : the legs are also pale yellow ; 

 the tips of the thighs and of the tibiae are darker; the knees and the tarsi are black. 



Found near Lancaster, at the end of October. 



Aphis nociva. 



The winged male. — The body is small and black : the feelers are shorter than the 

 body and rather thick till near their tips : the rostrum is yellow with a black tip : the 

 abdomen is rather dark green : the tubes are black and as long as one-eighth of the 

 body : the legs are yellow ; the hind thighs except the base, the tips of the other thighs 

 and of the tibiae, and the tarsi, are black : the wings are colourless ; the squamulae are 

 yellow ; the stigmata and the veins are brown. 



Found with the preceding. 



Aphis consona. 



The winged viviparous female. — The body is black, shining, stout, plump, of mo- 

 derate size, slightly covered beneath with a gray bloom : the abdomen is dark dull red 

 beneath, and sometimes its back is very dark green : the antennae are black and rather 

 more than half the length of the body : the rostrum is black, green towards the base : 

 the tubes are black and about one-fifth of the length of the body : the legs are black ; 

 the thighs at the base, and the shanks excepting their tips, are dull green : the wings 

 are colourless ; the squamulae are pale yellow ; the stigmata are pale brown ; the veins 

 are brown. While a pupa it is short, broad, and nearly elliptical, with a brassy tinge 

 on the back, slightly covered beneath with a white bloom, which also extends above 

 in a transverse band : there is a pale red spot at the base of each tube : the rudi- 

 mentary wings are pale green ; their tips and the legs are black. 



Found at the end of April. 



Aphis bellula. 



The winged viviparous female. — The body is black and very small : the borders of 

 the fore chest are dark green : the abdomen is very dark green and marked above with 

 black : the antennae are a little shorter than the body : the rostrum is dull green with 

 a black tip : the tubes are dull green and hardly one-eighth of the length of the body: 

 the legs are pale green ; the tarsi, the tips of the thighs and of the tibiae, and the four 

 hinder thighs from the middle to the tips, are black : the wings are colourless and 

 very much longer than the body ; the squamulae and the costal veins are pale yellow; 

 the stigmata and the veins are brown. 



Var. P — Much larger, and the abdomen is green on the back as well as below : 

 the stigmata are pale brown. 



