CHERRY. LEAVES CHERRY PLANT LOUSE. 133 



thieha 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 PtjPiE are 03 in length, and like the wingless females in the details of their 

 colors and like the larvje in their form, but are known by having the rudiments of 

 wings which appear like ve.-icular scales of a white or pale green color on each side of 

 the body rather forward of its middle, and as it approaches matuiity the thorax 

 between the fore part of these scales becomes swelled, presenting a blisterid-liko 

 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-lilie appendage. If K. 

 Fonsoolomb had confined the pupse which he describes, they would probably have 

 furnished him with winged specimens within twenty-four b"urs. When the perfect 

 insect crawls out of its pupa tkinthe 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 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 antennse and legs are also white when it first , 

 comes from its pupa state. 



The WINGED FEMALES measure 0.05 to thcr tip of the abdomen, and 012 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 pn jects a short conical tail-like appendage, the nectaries 

 reaching to its base; antennse black and about three fourths aslongas the body ; the 

 beak short, arising between the 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, and the basal half of the thighs white. The wings are 

 transparent, their bases, outer margin and rib-vein whi'e, 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 Up 

 than at its base, and rather farther from the second at its base than this is from the 

 first ■ the tip of the firsl^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 tlian that is to the 

 second; second foik 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 the third vein is equidistant be- 

 tween the first f jrk and second vein, in which the lefc wing has but one fork, and in 

 which the right wing has three folks. 



The remedies already spoken of in connection with the ^pple 

 plant-louse are equally applicable to this species, and the same 

 destroyers which were there described, namely the Aphis-lions, 

 the Lady-birds or CoccinellidcB and their larvse,' and those of this 



