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the fifth or seventh. Legs pale dull yellowish or whitish; feet, tips 
of the shanks, and of the thighs, dusky, the hind thighs blackish, ex¬ 
cept near the base. Wings transparent, but not perfectly pellucid; 
the stigma dull white. 
Dr. Fitch mentions the following variations in color: 
Antennae, brownish yellow; neck not green, thorax dull green; abdomen, 
yellowish; abdomen without black dots. 
The pupae examined the past season from the extreme northwest 
part of the State presented the following characteristics: 
General color pale transparent green, with three more or less dis¬ 
tinct darker green lines along the back; the underside uniform bright 
apple green. Antennae whitish except at the tips, about two-fifths the 
length of the body; honey tubes pale at the base, dusky at the tips, 
cylindrical, reaching nearly to the tip of the abdomen. Length about 
.08 of an inch. The very young are of a transparent whitish color 
throughout. 
The thorax of the winged individuals sometimes has only the lobes 
black. 
Aphis malifolij:, Fitch. Apple-leaf Aphis. 
This species, which was first described by Dr. Fitch, in 1856, has 
very probably, been often mistaken for the preceding on account of its 
similarity in habits. In fact, Walker, in the appendix to his catalogue, 
gives this name as a mere sjmonym of the former. It is possible, it is 
but a variety of the former; but I here follow Dr. Fitch, and give it as 
a distinct species. 
It is larger than the A. mail, measuring rather over one-seventh of 
an inch to the tips of the closed wings; of a shining black color 
throughout; the legs are also entirely black, an occasional specimen be¬ 
ing found in which these are pale brownish at the base. The wings dif¬ 
fer very distinctly from those of the preceding species. They are more 
slender, and the fourth vein (of the front wings,) is relatively shorter 
and more strongly curved throughout its entire length. In conse¬ 
quence of this curvature, it is neater the second fork at its base than at 
its tip. The third vein is but slightly aborative at its base. In the former 
species, the first fork branches from the third vein beyond its middle; 
in this species, it is given off much nearer the base, at about one-third 
the distance from the base to the tip; in the former species, the second 
branch or fork is much less than half as long as the first; in this 
species, it is usually half as long. 
Dr. Fitch, from whose report the above description is chiefly taken, 
states that he gathered this species from the leaves of the apple trees in 
Mercer county, Illinois; two-thirds of all the specimens he gathered 
at the time belonging to this species. 
I have noticed the same species in the southern portion of the 
State, and am inclined to think a close and careful examination of the 
Aphides infesting the leaves and twfigs of our apple trees would pos¬ 
sibly reveal the fact that this species is as common and as numerous 
as the A. mail, or, as Dr. Fitch believes, more numerous. 
The name given implies that it is confined to the leaf, but this, I 
think, is a mistake; that this is the habit of the species, I think 
