CHERRY 



LEAVES — CHERRY PLANT-LOUSE. 133 



tips of the shanks, and commonly the 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 Pupje are 0.06 in length, and like the wingless females in the details of 

 their colors and like the larvae in 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 pupte 

 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 extending 

 and unfolding until they attain their full size, but still retaining their white 

 hue. They soon, however, become transparent, but like all 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 appen- 

 dage, the nectaries reaching to its base; attennaj black and about three-fourths 

 as long as the body; the beak short, arising between the two fore legs and 

 scarcely reaching the bases of the middle pair, its color black or dusty with 

 the tip black; the legs black with the shanks except at their tips, and the basal 

 half of the thighs white. The wings are transparent, their bases, outer mar- 

 gin and rib-vein white, the remaining veins blackish 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 the tip of third vein is equidistant 

 between the 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 Coccinellidts and their larvae, and those of the 



