87 
WINGLESS FEMALE. 
4 
Fig. 13.—Melon plant-louse (Aphis cuwewmeris, n. 8.) Wing- 
less female, magnified 40 diameters. 
Body green or greenish-black throughout, antenne black at base 
and tip; cornicles black, tail yellowish, legs pale, with tarsi and 
tip of tibie black. Body broad ovate, widest behind, thorax with- 
out spine. Cornicles minutely roughened. Antenne with imbricated 
transverse ridges, excepting the two basal joints. Body .06 inch 
long, .037 inch wide, antenne .05 inch in length, cornicles .018 inch. 
ROOT FORM. 
Broad ovate, tapering and acuminate 
posteriorly, pale bluish green. Head, 
eyes, base and tip of antenne, two basal 
aand last joints of tarsi, tips of tibie and 
femora, and tip of cornicles, black; legs 
white. Beak very long, reaching to the 
third segment of the abdomen, tip black- 
ish, mouth at and about the base of 
rostrum dusky. Antenne short, reaching 
the base of the abdomen, five-jointed, 
and the fifth with a setaceous tip less 
than twice as long as the basal portion ; 
third joint about equal to the fifth. 
Cornicles cylindrical, scarcely longer than 
the following segment of the abdomen. 
Pi ccics start lense (A nig »WOrax with a spine each side. A tu- 
Gicumeris, nis) Rootform,mag- bercle on each side of the first and sixth 
anes *) diameters. abdominal segments, visible only from 
behind, and a very small one on the metathorax, behind the pro- 
thoracic spine. Length, .¢5 inch; width, .08 inch; antenne, .02 inch. 
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