200 Mr. F. Walker’s Descriptions of Aphides. 
ribs are yellow ; the wing-brands are pale brown; the veins are 
brown. 
16th var. The body is black and very small : the feelers are as 
long as the body : the mouth is dull yellow with a black tip: the 
nectaries are as long as one-eighth of the body: the fore-thighs 
are yellow at the Babes ; the shanks are dark yellow with black 
tips : the wing-ribs are yellow; the brands are pale brown ; the 
veins are elefrle: brown, and very distinct. 
17th var. The body is black : the abdomen is green : the feel- 
ers are a little more than half the length of the body : the mouth 
is yellow towards the base: the nectaries are as long as one-sixth 
of the body : the legs are black ; the fore-thighs at “the base, and 
the shanks except their tips are yellow : the w ing-ribs are yel- 
low ; the brands and the veins are brown. 
18th var. The body is black: the borders of the fore-chest 
and the abdomen are dark green ; the back of the latter is black : 
the feelers are nearly as long as the body: the mouth is pale yel- 
low with a black tip: the nectaries are black, and as long as one- 
sixth of the body: the legs are pale yellow; the four hinder 
thighs, the knees, the feet, and the tips of the shanks are black : 
the wing-ribs and the rib-veins are pale yellow ; the brands and 
the other veins are pale brown. 
19th var. The fourth joint of the feelers is full half the length of 
the third ; the fifth is shorter than the fourth ; the sixth is a little 
longer than the fifth ; the seventh is a little longer than the sixth. 
20th var. The fourth joint is nearly half the length of the 
third ; the fifth and the sixth are slightly club-shaped, and are 
each as long as the fourth ; the seventh is hardly longer than the 
sixth. 
21st var. The sixth joint is a little longer than the fifth. 
22nd var. The third joint is as long as the three following 
joints, and the seventh is about thrice the length of the sixth. 
23rd var. While a pupa it resembles the wingless Aphis, but 
the rudimentary wings are pale green: sometimes the body has 
two lively green stripes along the abdomen, and the colour varies 
to pale red which is sometimes varied with green and with brown. 
When winged it is dull greenish yellow: the disc of the chest 
and that of the breast are black: there is a brown band across 
the fore-chest : the feelers are shorter than the body : the mouth 
is yellow with a black tip: the nectaries are pale yellow with 
black tips, and as long as one-fifth of the body: the thighs are 
pale yellow. 
24th var. While a pupa the body is pale green varied with 
dark green, or pale red varied with yellow: the head and the 
fore-chest. are pale red: the legs are pale greenish yellow ; the 
feet are black. 
