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. 
Ist 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 dise 
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. 
