Mr. F. Walker's Descriptions of Aphides. 275 



1st var. The body is dark brownish green. 



2nd var. The feelers are nearly one- fourth of the length of the 

 body. 



3rd var. The feelers are half the length of the body. 



4th var. The feelers are three-fourths of the length of the 

 body. 



5th var. The nectaries are one-twelfth of the length of the 

 body. 



6th var. The fore-legs are longer than usual. 



The viviparous winged female. The pupa is not only distin- 

 guished from the wingless insect by its structure, but also by its 

 darker colour and by its greater activity : the feelers are brown, 

 pale green at the base : the legs are pale green ; the feet and the 

 tips of the shanks are brown : the rudimentary wings are pale 

 green. The wings are unfolded in May, and the insect is then 

 pale olive-green ; the limbs are still paler, and the wings are milk- 

 white : it is afterwards black : the abdomen is brassy black above, 

 very dark green and covered with white powder beneath : the 

 feelers are much shorter than the body; the fourth joint is 

 shorter than the third ; the fifth is shorter than the fourth ; the 

 sixth is much shorter than the fifth ; the seventh is more than 

 twice the length of the sixth : the nectaries are as long as one- 

 twelfth of the body : the legs are dull green ; the feet, the tips 

 of the thighs and of the shanks, and the whole of the hind- 

 thighs are black : the wings are colourless, and very much longer 

 than the body : the wing-ribs are almost white ; the wing-brands 

 are green ; the veins are brown. 



At least eight young ones may be seen in its body while 

 it is yet a pupa : the feelers are a little shorter than the body ; 

 the fifth joint is much shorter than the fourth ; the seventh 

 is nearly thrice the length of the sixth : the fore-legs are only a 

 little shorter than the hind-legs ; the fore-shanks are slightly 

 curved, and very much longer than those of the wingless female : 

 the nectaries are about one-twelfth of the length of the body : 

 the widening of the main vein into the wing-brand begins at 

 about half the length of the wing; it is very gradual in its ap- 

 proach towards, and union with, the fore-border, which is rather 

 convex towards the base of the wing : the brand is irregularly 

 spindle-shaped, and the fourth branch-vein springs from the 

 middle of its hind-border; the third branch-vein is, as usual, 

 obsolete before its source from the main-vein ; its first fork 

 occurs soon after one-third of its length, and its second fork 

 soon after five-sixths of its length. 



1st var. The legs are black, with the exception of the yellow 

 base of the fore-thighs. 



2nd var. The wing-brands arc pale brown. 



18* 



