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 ; the 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. 



1st 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 



