16 Mr. F. Walker's Descriptions of Aphides. 



is more or less varied with red : there are no tubercles in front of 

 the head. 



The viviparous winged female. The pupa appears before the 

 end of April, and the wings are unfolded in May. The insect 

 is then black : the fore-chest and the abdomen are green ; the 

 former has a broad black band across it, the disc of the latter is 

 black, and there are rows of black spots on each side : the feelers 

 are slender, and nearly or quite as long as the body ; the base 

 of the third joint is pale yellow ; the fourth joint is very much 

 shorter than the third ; the fifth is much shorter than the fourth ; 

 the sixth is more than half the length of the fifth ; the seventh 

 is nearly as long as the third, and thrice the length of the sixth : 

 the mouth is pale green with a brown tip : the nectaries are black, 

 and about one-sixth of the length of the body : the legs are pale 

 yellow ; the feet, the tips of the thighs and of the shanks, and 

 nearly the whole of the hind-thighs are black : the wings are 

 colourless, and longer than the body ; the wing-ribs are pale 

 green ; the wing-brands are pale brown, and the veins are darker ; 

 the second vein diverges from the first, but is nearly parallel to 

 the third ; the forks of the latter begin usually at one-third and at 

 two-thirds of the length ; the fourth is slightly curved at its base, 

 but nearly straight towards its tip; the angle of the brands whence 

 it springs is very slight. 



1st var. The abdomen is dark reddish green, with a row of 

 black spots on each side : the feelers are shorter than the body : 

 the mouth is dark yellow ; its tip is black : the nectaries are as 

 long as one-twelfth of the body : the thighs are black with the 

 exception of the base : the wing-ribs and the rib-veins are pale 

 yellow. 



2nd var. The abdomen is black : the nectaries are about one- 

 tenth of the length of the body : the mouth is red with a black 

 tip : the shanks, with the exception of their tips and the fore- 

 thighs towards the base, are also red : the wing-brands are dull 

 buff. End of July. 



3rd var. Dark brown : the abdomen is dull yellow ; the disc 

 of its back and a row of spots on each side are black : the feelers 

 are black, very slender, and a little longer than the body : the 

 mouth is yellow ; its tip and the eyes are black : the nectaries are 

 dull dark yellow, and as long as one-eighth of the body : the legs 

 are black, slender, and rather long ; the thighs towards the base 

 and the shanks with the exception of their tips are yellow. End 

 of September. 



In October this variety, which is of large size, occurs in abun- 

 dance beneath the leaves, and is surrounded by flocks of bright 

 green little ones, which as they continue to grow assume a bright 

 pale red or yellow colour, and a variety of other tints. 



