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and in that the entire life is spent under ground, except when the 
winged forms migrate. The little brown ant cares for the aphis 
eggs during the winter, and early in spring the lice hatching from 
these eggs are carried by the ants to the roots, along which they 
have made burrows. The lice insert their beaks into the root, and 
viviparous female, and tip of 
body, more enlarged. Length Fig. 33. Corn Root-louse, Aphis maidiradicis , winged vivip 
about one sixteenth inch. arous, female. Length nearly one twelfth inch. 
obtain their food, as do the aerial forms, by sucking the juices 
of the plant. Thruout the summer the ants are in constant at¬ 
tendance upon the aphids, and carry the young to new roots as 
is necessary. In the fall the aphis eggs are taken by the ants to 
their nests and cared for during the winter. The aphids give off 
a honeydew, an excretory product from the anus, which is greatly 
relished by the ants, and is no doubt responsible for the faithful 
attentions they bestow upon the root-lice and their eggs. 
Remedial Measures .—Carbon bisulfid is a very reliable remedy. 
It may be applied thru a diagonal hole in the earth so made, with 
a stick, that the bottom of the hole will be beneath the principal 
roots, and the opening several inches away from the stems—since 
injury is likely to result if the bisulfid comes in contact with them. 
A small tablespoonful of the liquid carbon bisulfid is injected into 
the hole, which is immediately closed with earth. The fumes 
given off by the liquid thus confined will be strong enough to kill 
the lice as soon as they reach them. A simple device (Fig. 34) 
used by Mr. A. A. Sawyer, of Oak Park, to inject the liquid, is 
of value, not only because of the great rapidity with which it 
enables one to treat plants, but also because it lessens the chance 
of getting the liquid, which is destructive to plant tissues, on the 
plants. The piston (b) is inserted in the round tin tube (a), and 
