512 
Annual Report of New York 
Variety a. Second vein at base equidistant between the first and third veins. Com¬ 
mon in Europe, very rare in America. 
Var. b. Third vein at tip equidistant between the first fork and second vein. 
Var. c. First fork at tip twice as far from the third vein as from the second fork. 
Var. d. First fork at tip equidistant between the third vein and the second fork. 
Common in Europe, but not found as yet in America. 
Var. e. Second fork at tip nearer to the fourth vein than to the first fork 
It will be observed that I have described the veins of the wings as 
they are given by Mr. Walker in a paragraph which he designates as 
being a variety of this species. But on the different plants and shrubs 
of this country upon which this aphis has occurred to my observation 
the venation of the wings has uniformly been atter this formula; and 
I have never seen what Mr. Walker regards as the normal venation, 
except in the European specimens of this species in my cabinet. The 
separate items of this formula, however, have been met with in par¬ 
ticular specimens, all except the one which I have above designated 
as Var. d. 
The wingless female when hibernated to pass the winter season 
differs in several of its characters from its appearance at other periods 
of the year, as will be seen from the following description : 
Variety, Hibernated wingless female. Length 0.065. Of an elliptic form, 
broadest across the middle, tapering at tip to an acute point, and bluntly rounded at the 
forward end; flattened on the back and moderately convex, clothed throughout with 
scattered hairs. Color dull black, not at all glossy; back of the honey-tubes having 
a tinge of gray. Head more broad than long, nearly hemispheric in its form. Beak 
more thick than the forward shanks, its end reaching to the middle pair of legs, its 
color pale yellowish white. Antennie not half the length of the body, very slender, 
not half the thickness of the legs, more slender toward their tips, habitually held 
curved to a semicircle, with their tips applied to the surface; pale, with the outer 
two-thirds of their length dull black; seven-jointed, the two first joints small, thick 
and short, the third joint longest, the sixth shorter than those next it, the seventh 
long and slender, double the length of the sixth ; these organs variable in the details 
of their structure, the two sides frequently differing in the same individual. Thorax 
widening backward, an impressed line across its middle marking the suture whereby 
the back is divided into two segments. Abdomen with faint transverse impressed 
lines visible in places, imperfectly marking the sutures; each side elevated into a 
rounded ridge, with a row of punctures commonly visible in the groove along the 
inner side of this ridge. Honey-tubes short, their length less than half the distance 
from them to the tip. End of the ovipositor slightly protruded and resembling a 
short tail little longer than thick. Legs pale, glossy, dirty yellowish white varying to 
dirty olive their whole length; four forward shanks more slender than their thighs; 
hind shanks thicker and longer than the hind thighs. Feet extremely slender and 
snort, blackish; when highly magnified found to be a third the thickness of the 
anterior shanks, and appearing to be formed of a single joint which is four times as 
long as thick, slightly narrowed at its base and at its tip furnished with a pair of 
hooks. 
