ww
  l .
t` l 26 B2¢Z{ez‘z¢z N0. 91.
l
l, Pergande notes his dates of collecting, from which he appears
  to:haveJ found the aphides on various plants during the. Fall
_ I and as late as December.
in { S0 far as I know the egg-laying form has only been found `
  l OH Strawberry plants,’l‘ but it is probable that it passes the win-
  i ter 011 Other perennials, also, Pergande, as has been already
  l noted, found the insect on the ground ivy (Nc,bc[a _g‘]c’£h0i?ZéZ), 9.
  Q COIHEHOII weed in Kentucky fields, and possibly one Of itS Will-
. _ * ter ood plants.
  V   THE PROPER NAME.
  i The name melon aphis is very commonly used for the insect
    because the injuries are rather more severe to musk melO11S
  l (C€111t3.lOt1p) than to other members of the family. Growers
i W E of cucumbers frequently refer to it in correspondence as the
  j · 1 ' pickle louse, while growers of cotton farther south know it as
}   , the cotton louse or cotton aphis, These names are all allow-
    able.
Q `\/Vhile Pergande is probably right in considering the c0tt0¤
  i 8.pl1iS identical with the melon aphis, the grounds fOr 3CC€Pt·
  l ing Gl0ver’s name Aphis gpssgybii in place of Forbes’ A. CM-
    CZ¢7}l€7'Z-S d0 not appear entirely satisfactory. In hiS first BC-
    i count of the cotton louse (Patent Oihce Report, 1854.) the iig·
  g ures given in plate 3 might pertain to almost any member of
    genus Aphis. The description is also vague, and cannot be
  i considered as characterizing the species. Indeed Glover was
  doubtful at this time about the proper genus for the insect.
  His description reads ; " The young lice are extremely min-
  ute and of a greenish color; but when they become older, tl1ey
    are about a tenth of an inch in length, and often of a dull
  green, or, in some instances, almost black.- ’i‘ di * The
  . end of the abdomen of both sexes is provided with two slender
  tubes, rising like horns from the back." * ’?‘ ’l‘ Gloveriev-
  y idently never saw the sexes of this insect, though he happens
  . to be right about the presence of tubes (cornicles), since these
    are very generally present in aphides of both sexes in var1ouS
  *Pergande found a winter egg on purslane in October, which llllplles
  that the egg-laying generation sometimes develops on annuals.
s   i ‘
l. . ‘