Mr. F. Walker’s Descriptions of Aphides. 51 
a black tip: the nectaries are green, spindle-shaped, and about 
one-sixth of the length of the body; their tips are black: the 
legs are pale yellow; the feet and the tips of the thighs and of 
the shanks are black: the wings are colourless, and much longer 
than the body; the wing-ribs and the wing-brands are pale 
green ; the veins are brown. 
Ist var. The mouth is pale yellow with a black tip: the nec- 
taries are cylindrical ; their tips are brown: the feet: and the tips 
of the thighs and of the shanks are also brown. 
2nd var. The abdomen is green, and has a row of transverse 
black spots along the middle of the back, and a row of black dots 
on each side: the feelers are nearly as long as the body: the nec- 
taries are black : the wing-ribs are pale yellow ; the wing-brands 
are dull buff. 
ord var. The legs are green; the thighs except the base an 
the feet are black : the wing-brands are pale brown. 
4th var. Green: the lobes of the chest are brown, and the 
breast is pale gray: there is a vivid green stripe along the mid- 
dle of the abdomen, which is whitish beneath : the feelers are pale 
green towards the base: the eyes are darkred: the thighs are 
' pale green; the shanks are dull yellow ; their tips and the feet are 
black : the wing-ribs, the rib-veins, and the wing-brands are pale 
__ yellow ; the other veins are pale brown. In the autumn. 
5th var. The nectaries are pale yellow, and rather more than 
one-fifth of the length of the body. 
6th var. Black: the borders of the fore-chest, the fore-breast, 
and the abdomen are greenish yellow; the back of the latter is 
varied with black: the nectaries are dark yellow, black towards 
the base and at the tips, and rather more than one-sixth of the 
length of the body: the thighs are pale yellow from the base to 
the middle, and black from thence to the tips; the shanks are | 
dark yellow, their tips and the feet are black : the wing-brands 
are brown. | 
It acquires wings on the lettuce at the end of May. Fourth 
generation ? 
‘7th var. Pupa. Limbs blackish green. 
Sth var. Pupa. Pale yellow; the feelers are as long as the 
body ; the tips of the joints and the whole of the latter joints are 
brown : the tips of the mouth, the tips of the nectaries, the feet, 
and the tips of the shanks are also brown. On the sow-thistle. 
_ 9th var. Black: the fore-chest is dark green ; its fore-border 
and its hind-border are light green : the abdomen is green, and 
has a large black spot near the tip of the back, and a row of 
___ black dots on each side: the nectaries are pale yellow with brown 
4g tips: the legs are pale yellow ; the feet and the tips of the thighs 
and of the shanks are black ; the wing-brands are pale brown. 
4-x 
