276 Mr... Walker’s Descriptions of Aphides. 
ord var. The second fork in the third vein of the fore-wing is 
wanting. The length of this second fork is often very variable 
in the same species, and eyen in opposite wings of the same 
Aphis. 
Length of the body 3-1 line ; of the wings 23-3 lines. 
79. Aphis Sorbi, Kaltenbach. 
Aphis Sorbi, Kalt. Mon. Pflan. i. 70. 51. 
The viviparous wingless female. This species is hatched in the 
middle of March or somewhat later, and then begins to feed on 
the buds of the apple-trees: it is very small and of a dark green 
colour: the head, the limbs, and a stripe on each side of the body 
are still darker: the feelers are not more than half the length of 
the body : the eyes are dark brown: the mouth reaches the base 
of the hind-legs: the nectaries are about one-eighth of the length 
of the body: the legs are rather short and stout. When full- 
grown the body is nearly round, dark reddish brown, and thickly 
covered with white powder: the limbs are black: the front is 
nearly straight, but has three slight tubercles: the feelers are 
half the length of the body : the nectaries are about one-ninth of 
its length. 
Ist var. Dull green, short, and very plump: the feelers are 
brown, dull green at the base, and shorter than the body: the 
eyes are black: the mouth is dull green with a brown tip: the 
nectaries are black, and as long as one-tenth of the body: the 
legs are pale yellow, and rather long; the feet, the tips of the 
shanks and of the four hinder thighs are black. 
2nd var. Very dark green: the thighs are black with the ex- 
ception of the base which is pale yellow: the nectaries are one- 
eighth of the length of the body. 
“8rd var. Nearly round, dull reddish green, paler beneath : the 
feelers are black, and nearly as long as the body: the tip of the 
mouth is black: the nectaries are as long as one-sixth of the 
body: the legs are gray, excepting the base of the fore- thighs 
which is dull yellow. 
Ath var. The feelers are hardly half the length of the body. 
5th var. The young one has a large dull tawny spot at the 
base of each nectary. 
6th var. Dark reddish brown: the limbs are black : the feelers 
are half the length of the body; the nectaries are one-ninth of 
its length. 
7th var. Pale orange. 
8th var. Dark orange. 
9th var. Pale green. 
10th var. Pale buff, darker towards the tip of the abdomen. 
11th var. Pale red, short-elliptic: the feelers are white with 
