No. 145.j 
837 
thighs at least of the hind legs, except at their bases, black. The abdomen has an 
elevated lateral margin, upon the upper side of which is a row of large impressed 
punctures. 
The Pup* are 0.06 in length, and like the wingless females in the details of their 
colors and like the larva; iu their form, but are known by having the rudiments of 
wings which appear like vesicular scales of a white or pale green color on each side of 
the body rather forward of its middle, and as it approaches maturity the thorax 
between the fore part of these scales becomes swelled, presenting a blistered-like 
appearance of a dull reddish yellow color, which sometimes is the color of the body 
also; its nectaries equal the tip, which has no projecting tail-like appendage. If M. 
Fonscolomb had confined the pupro which he describes, they would probably have 
furnished him with winged specimens within twenty-four hours. When the perfect 
insect crawls out of its pupa skin the head and thorax are dark reddish brown, and 
the wings are milk white and still folded in the form of small scales, as they are in 
the pupa; but in a few moments they start out longer and longer, gradually extend¬ 
ing and unfolding until they attain their full size, but still retaining their white hue. 
They soon, however, become transparent, but like aj; the other aphides when newly 
hatched, the wings remain dim for several hours, their surface appearing as though 
it was sprinkled over with dew. The antennae and legs are also white when it first 
comes from its pupa state. • 
The winged females measure 0.05 to the tip of the abdomen, and 0 12 to the 
ends of the wings, which when spread are 0.20 across; they are deep black and 
shining, the abdomen nearly twice as broad as the thorax, and egg-shaped, with an 
acute apex from which projects a short conical tail-like appendage, the nectaries 
reaching to its base; antenna; black and about three fourths as long as the body; the 
beak short, arising between tho two fore legs and scarcely reaching the bases of the 
middle pair, its color black or dusky with the tip black; the legs black with the 
shanks except at their tips, a D d the basal half of the thighs white. The wings are 
transparent, their bases, outer margin and rib-vein white, the remaining veins black¬ 
ish with their bases pale; the stigma opake and dull white with its margins black, 
that on the inner side being wider; the second vein is about a third farther from the 
first at its tip than at its base; the third is slightly farther from the second at its tip 
than at its base, and rather farther from the second at its base than this is from the 
first; the tip of the first fork is but little .nearer the tip of the second fork than to 
that of the third vein, much nearer the tip of the third vein than that is to the 
second; second fork nearer at tip to the fourth vein than to the first fork, much 
nearer the fourth vein than this is to the tip of the rib-vein. 
Varieties have been observed in which tjie tip of the third vein is equidistant be¬ 
tween tlie first fork and second vein, in which the left wing has but one fork, and in 
which the right wing has three forks. 
The remedies already spoken of in connection with the Apple 
plant-louse are equally applicable to this species, and the same 
destroyers which were there described, namely the Aphis-lions, 
the Lady-birds or Coccinellidee and their larvse, and those of the 
