Mr. F. Walker’s Descriptions of Aphides. 389 
twice the length of the sixth: the eyes are dark red or black: 
the mouth is green or pale green; its tip and the nectaries are 
black, the latter are about one-twelfth or one-twentieth of the 
length of the body: the legs are pale green; the feet and the 
tips of the thighs and of the shanks are black: the wings are 
white or colourless and much longer than the body ; the wing- 
ribs, the rib-veins and the wing-brands are pale green, the latter 
are sometimes pale brown; the other veins are brown; the first 
vein is more perpendicular than is usual in this group, and the 
second vein diverges much more from it than it does from the 
third ; the first fork of the latter vein is a little after one-third 
and the second much more after two-thirds of its length; the 
fourth vein is curved moderately and equally throughout its 
length, and the angle whence it springs is very slight. 
1st var. The legs are white ; the feet and the tips of the shanks 
are brown. 
The oviparous wingless female. The body is small, slender, 
nearly linear, rather flat, smooth, whitish green tinged with 
yellow, not shining: there is a dark green stripe along the back : 
the head is yellow: the feelers are black, pale yellow at the base 
and about half the length of the body: the eyes are dark red: 
the mouth and the nectaries are pale yellow with black tips, and 
the latter are hardly one-tenth of the length of the body: the 
legs are pale yellow and rather short ; the knees, the feet and the 
tips of the shanks are black. On Elymus or Calamagrostis are- 
narius. 
lst var. The body is green : the eyes are nearly black. 
2nd var. The back of the body hasa bluish tinge. On Salsola 
Kal in the beginning of October near Fleetwood. 
The wingless male. Like the oviparous female, but smaller : 
the feelers are about half the length of the body. 
Length of the body 3-3 line; of the wings 24 lines. 
83. Aphis Lythri, Schrank. 
Aphis Lythri, Schrank, Faun. Boic. i. 1. 115. 1215; Kalt. 
Mon. Pflan. i. 51. 36. 
Lythraphis, Amyot, Ann. Soc. Ent. Fr. 24 série, v. 477. 
The viviparous wingless female. This insect feeds on Lythrum 
Salicaria in the summer. It is small, pale green, oval, shining, 
and slightly convex: the feelers are pale yellow, and shorter than 
the body, their tips and the eyes are black: the mouth and the 
nectaries are also pale yellow with black tips, and the latter are 
as long as one-fourth of the body: the legs are pale yellow, and 
moderately long; the feet are darker. While young it is nar- 
rower and more linear. The front has three small tubercles ; the 
first and the second joints of the feelers are not angular; the 
fourth is much shorter than the third; the fifth is a little shorter 
