870 [Assembly 
curved towards the tip of the first vein; the third vein arises from the basal extremi¬ 
ty of the stigma and forward of its furcation curves perceptibly towards the apex of 
the wing; the fourth vein is longer than the second fork. 
The little spotted-winged amis (/?. maculella) differs from Caryella in having 
only a slender black ring at each articulation of the antenme, the feet and a band near 
the tips of the hind thighs blackish, the stigma salt-white, its base black, its apex 
dusky; fourth vein with a black dot on its base and a dusky one on its apex; the 
first vein, apical third of the second vein, and the first and second forks broadly mar¬ 
gined with smoky brown; second vein wavy and parallel with the third vein till near 
its tip where it curves towards the first vein, its ‘base a third nearer the third than it 
is to the first vein; third vein arising from the anterior extremity of the stigma, with 
a dusky spot on its apex. 
The little smoky-winged aphis (A. fumipennella) is of a dull yellow color 
with blackish feet and the wings smoky with robust brown veins, the rib-vein much 
more distant from the margin the first half of its length than in the other species, and 
from its middle to the stigma approaching the margin, the fourth vein long, equal¬ 
ling the stigma in length. 
Tiie little black-margined aphis (A. marginella). Pale yellow, antennae 
white, their bases and four bands black; a coal black band in front between the eyes 
and continued along each side of the thorax to its base; elytra pellucid, stigma, 
outer margin and rib-vein coal-black, first vein with a black dot on its base; fourth 
vein lender, black, the other veins colorless; outer margin of the hind wings black. 
Length 0.15. 
In addition to the preceding a remarkably large aphis is des¬ 
cribed by Dr. Harris, under the name of A. Caryce. A species 
which forms plaits or folds in the veins of the leaves and which 
probably pertains to the genus Pemphigus , and also a woolly 
aphis ( Eriosoma) inhabiting this tree is known to me. These, 
with the species which forms galls upon the leaf-stalks and twigs, 
make nine different kinds of these vermin which live at the ex¬ 
pense of our hickory and walnut trees. 
