50 Mr. F. Walker’s Descriptions of Aphides. 
are cylindrical and about one-sixth of the length of the mony? > 
the thighs are green towards the base. | 
Qnd var. Pale green, elliptical, convex, smooth, and shining: 
the feelers are pale yellow: the tips of the jomts are black: the 
nectaries are about one-sixth of the length of the body; their 
tips are pale brown: the legs are pale yellow; the feet and the 
tips of the shanks are black. 
8rd var. Pale lively green, oval, not shining: the head ated 
the limbs are white, but tinged with green: the feelers are 
shorter than the body; the tips of their joints are sometimes 
black, as are also the tip of the mouth, the knees, the feet, and the 
tips of the shanks. 
4th var. The body is of a fresh hight green colour, but not 
shining; it has a whitish tinge especially towards the head, and 
is sometimes mottled with white or with pale red: the feelers are _ 
pale yellow, and nearly as long as the body; the tips of the 
joints are black : the eyes are dark red : the mouth is pale yellow 
_ with a black tip, so also are the nectaries, which are nearly one- 
fourth of the length of the body: the legs are pale yellow; the 
feet and the tips of the shanks are black. 
5th var. Of a clear white colour. In the autumn on Crepis 
tectoria. 
The viviparous winged female. Green: the head and the fore- 
chest above are dark green: the disc of the middle chest and 
that of the middle breast are almost black, and there are black 
bands across the upper segments of the abdomen: the feelers. 
are black, a little longer than the body, pale yellow towards the 
base which is dark green: the eyes are dark brown: the mouth 
is pale green with a black tip: the nectaries are pale green with 
brown tips, and about one-fourth of the length of the ¢ 
the legs are pale yellow, long and slender ; ‘the feet and the 
tips of the thighs and of the shanks are brown: the wings are 
colourless, and about twice the length of the body ; the rib-veins 
are pale green; the wing-brands are pale buff; the veins are 
brown. On the sow-thistle at the end of April. 
While a pupa it is green and rather flat: the feelers are dull 
pale green, and a little longer than the body; the tips of the 
joints are black: the mouth is green with a black tip: the nec- 
taries are spindle-shaped, rather dull buff, and about one-sixth 
of the length of the body: the legs are dull a green ; the 
knees and the tips of the shanks are brown. 
1st var. The limbs are blackish green. 
The wings are unfolded im May, and the Aphis is then black 
and shining: the fore-chest is green with a black band across it: 
the abdomen is grass-green ; its disc is chiefly black: the feelers 
are a little longer than the body: the mouth is pale green with 
