Mr. F. Walker's Descriptions of Aphides. 201 



than the body ; the wing-ribs, the rib-veins and the wing-brands 

 are pale green ; the other veins are pale brown. 



1st var. While a pupa it is brown : the head is red : the feel- 

 ers are pale yellow towards the base : the mouth is pale yellow 

 with a black tip : the nectaries are more than one-fourth of the 

 length of the body : the legs are pale yellow ; the feet and the 

 tips of the thighs and of the shanks are black : the rudimentary 

 wings are yellow. 



2nd var. The body is green : the disc of the chest is dull 

 tawny : the feelers are pale green at the base : the eyes are 

 black : the mouth is pale yellow with a brown tip : the nectaries 

 are pale yellow, and nearly one-fourth of the length of the body : 

 the legs are pale yellow ; the base of the thighs is pale green ; 

 the feet and the tips of the thighs and of the shanks are brown : 

 the wing-ribs and the wing-brands are pale yellow ; the veins are 

 brown. 



The oviparous wingless female. This appears with the male in 

 the autumn, and does not seem to differ outwardly from the vi- 

 viparous female. 



The winged male. While a pupa it is red : the limbs are black, 

 and the rudimentary wings are green with black tips : the wings 

 at the moment when they are unfolded are milk-white, as are 

 the other limbs, while the body is of a brillant red colour. The 

 winged insect is black : the fore-border and the hind-border of 

 the fore-chest, the fore-breast, and the abdomen are dark red : 

 the nectaries are as long as one-eighth of the body : the wing- 

 ribs and the rib-veins are yellow ; the brands and the other veins 

 are brown. 



1st var. The abdomen is dark yellowish brown : the base of 

 the fore-thighs and of the middle thighs is pale yellow. 



The front is narrow, and slightly concave : the tubercles on 

 each side have oblique tips, and are shorter than those of A. 

 Sonchi ; they form acute angles on their inner sides ; the first joint 

 is very slightly curved ; the second is more than half the length 

 and breadth of the first ; the third is much more slender than 

 the second; the fourth is a little shorter than the third; the 

 fifth is shorter than the fourth; the sixth is about half the 

 length of the fifth ; the seventh is as long as the third : the fore- 

 chest is rather long, narrower in front ; the sides are slightly 

 convex : the tip of the abdomen is compressed and sickle-shaped, 

 and is longer than the nectaries, which decrease in thickness from 

 the base to the tips : the shanks and the second joints of the feet 

 are slightly curved, and the former are bristly : the wings are 

 longer than those of A. Sonchi, but do not differ much in the 

 structure of the veins and of the brands from those species, but 

 the part of the brand beyond the angle is shorter, and its tip is 



Ann. % Mag. N. Hist. Ser. 2. Vol. ii. 14 



