Mr. F. Walker’s Descriptions of Aphides. 393 
rather more than the length of the body; their colour passes 
from pale yellow or pale green to brown or black; the dark 
colour begins at the last joints and at the tip of each joint, and 
spreads thence over the whole feeler: the eyes are bright red, 
or dark red, or brown, or black: the mouth is dull yellow, or 
pale yellow, or green, or pale green; its tip is brown or black: 
the nectaries likewise vary in colour, they have black or brown 
tips, and are one-fourth or one-fifth of the length of the body : 
the legs have the same variations in colour, and also vary slightly 
in length ; the feet and the tips of the thighs and of the shanks 
are brown or black ; thé thighs are paler than the shanks, and 
the dark colour in the former sometimes occupies half their 
length ; the hind-shanks and even the hind-thighs are some- 
times but very rarely brown or black: the limbs as usual are 
almost white when the skin has been lately shed. 
The viviparous winged female. While a pupa it is red: the 
feelers are yellow, black towards the tips, and as long as the 
body : the mouth is pale yellow ; its tip and the eyes are black : 
the nectaries are pale yellow with black tips, and as long as one- 
fourth of the body: the legs are pale red; the feet and the tips 
of the shanks are black: the rudimentary wings are whitish or 
pale green, or with brown or black tips. When the wings are 
unfolded the insect is black: the borders of the fore-chest, the 
fore-breast, and the abdomen are greenish yellow : the feelers are 
hardly shorter than the body: the mouth is pale yellow with a 
black tip: the nectaries are black, and as long as one-sixth of the 
body : 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 rib-veins are pale 
brown ; the other veins are brown. 
lst var. The body is dull green varied with black and red: 
the feelers are pale yellow towards the base, and a little longer 
than the body. 
2nd var. The body is rose-colour: the limbs and the rudi- 
mentary wings are white. 
3rd var. The body is black, and very small: the abdomen is 
dull green : the feelers are much shorter than the body : the mouth 
is dull yellow with a black tip: the nectaries are black, and as 
long as one-sixth of the body : the legs are yellow ; the feet and 
the tips of the thighs and of the shanks are black : the wing-ribs 
are pale yellow; the wing-brands and the veins are pale brown. 
4th var. While a pupa it is pale greenish yellow: the feelers 
are yellow, brown towards the tips, and a little shorter than the 
body : the nectaries also are yellow with brown tips, and nearly 
one-fifth of the length of the body : the legs are pale yellow ; the 
feet, and the tips of the shanks are brown. 
The winged Aphis is as variable in colour as the wingless ; it 
