272 Mr. F. Walker’s Descriptions of Aphides. 
stripes: the feelers and the legs are pale green; the tips of the 
former and the feet are brown. When the wings are unfolded 
the insect is black: the borders and the underside of the fore- 
chest and the abdomen are green: the feelers and the eyes are 
black: the mouth is green with a black tip: the nectaries are 
black, and as long as one-tenth of the body: the legs are pale 
yellow ; the feet and the tips of the thighs and of the shanks are 
black : the wing-ribs are pale yeliow, the brands are pale brown. 
On the whitethorn in the middle of June. 
6th var. The body is dull green: the head and the dise of the 
chest are varied with black: the feelers are brown, green at the 
base, and shorter than the body: the wing-ribs are pale green ; 
the veins are brown. 
7th var. While a pupa it is pale greenish yellow, with three 
vivid green stripes on the back: the feelers are pale yellow with 
brown tips and much shorter than the body : the mouth and the 
nectaries are pale yellow with brown tips, and the latter are 
nearly one-sixth of the length of the body: the legs are pale 
yellow ; the feet are brown. The winged Aphis is black: the 
abdomen is green: the feelers are rather short : the nectaries are 
black : the legs are pale green ; the feet and the tips of the thighs 
are black : the wing-veins are pale dull green. 
The fourth branch vein of the wing has a more gentle curve 
than that of many species, and the angle whence it springs is 
slight ; the third as usual is obsolete at its source, and it runs 
nearly half its length before it sends forth its first fork, and 
more than three-fourths of the same before it sends forth its 
second ; the second vein diverges slightly from the third as it 
proceeds to the hmd-border; they are nearer to each other at their 
source than the third is to the fourth ; the third converges gra- 
dually towards the fourth from the base to the tip; the first and 
second are nearer to each other at thew source than are the 
second and third, but more remote at their tips. 
Variations in the wing-veins.—I1st var. The second fork is 
wanting. 
2nd var. Both forks are wanting. 
8rd var. Like the last, but the second and the third veins 
meet, and after a short space part, and proceed to their re- 
spective destinations. 
4th var. The second fork in one wing is moderately long, in 
the other it is very short. 
The oviparous wingless female. It appears in the middle of the 
autumn, and when very young it is pale yellow or greenish yel- 
low: the tips of the feelers, the eyes, the tip of the mouth, and 
the feet are dark. When a little older it is elliptical, and of a 
soft pale velvet-like yellow hue : the feelers are black, pale yeHow 
