Enemzbs zyf Cucuméers and Re/aied Planis. 25
BFS grass (Le]§z`dz`z¢m w`¢gz`¢zzkz¢m), Amarantus sp? Dock (Rumex
Pa- -¢rz`spz¢s and others), Burdock, Dandelion, Pigweed (Chevzopm
ith .dz`um album), Worniseed (Che2z0_;50a’z`2¢m ¢z2z!beZmz`¢zMzkzzm), Plan-
‘uf' tain, Chickweed (S/e//aria medzkz), Morning glory, Three- ,
me seeded mercury (Aazbyiha 'Ul.7;g7Z·7ZZ2fZ), Button weed (Dz`0dz`a
is Aves), Ground ivy (1\%pcz‘cz glcchama), Red clover, Indian straw-
VEY berry (]%·¢z,g·arz'a Z.7ZlZ’Z.£{l), Mallow (/Wzzhza 7'O[Z¢7ZlZ,f7-0/Z-ll), Culti-
€S· 4 vated strawberry, Dwarf bean (P/Pasco/us mmus), Spinach, I ‘
lg- Hop, Cotton, Pear, European dogwood (Camus mas), Orange
as   Cifrzzs £l7£7'(Z7lliZ'7£7}Z and other varieties), Hydrangea, Begonia,
jamestown weed.
-‘iH · This list, it will be observed, includes weeds very commonly A
3lY found in cultivated ground, from which we may suppose the
melon louse is sometimes established in fields before melons or
>I¤ cucumbers are planted there. Growers sometimes complain
35. that planting on new ground affords them no relief from the
5€- injuries, and while the winged individuals can fly and thus z
bé make their way to new ground, it seems altogether likely that V I
By some of the instances of prompt infestation of new plantings
is is due to the fact that the aphides were already present, living
on some one or more of the weeds mentioned in the above list.
Yet it has been observed that the injury is as a rule most
severe where the cucumbers or melons have been grown for
VIS some time.
ts LIFE HISTORY.
of
It Accepting l’crgande’s conclusion that the egg-laying aphis `
id discovered by me in 1882 on the crowns of cultivated straw-
rd berries at Centralia, Illinois (referred to by Professor S. A. r
Ie Forbes in his report as Illinois State Iintomologist for the year  
is 1882, p. mz) is identical with the leaf-infesting viviparous
,5 species of melon and cotton, we know where and in what con-
1. dition the insect passes the winter. It becomes active early in
H Spring, but here in Kentucky I have had few complaints of
i_ it until the latter part of june and during july. Most of
h the injury occurs during the latter month. After july the
melon louse is generally suppressed by its insect parasites,
Y though it is to be seen until Fall. In his list of food plants