vercome this difficulty. The katydid, for instance, must die with the
approach of fall. Her children will not appear until the following
year. Her food consists of leaves, but to lay the eggs in such a
situation would be a fatal process, because the leaf will drop off
before the eggs hatch. Accordingly, the katydid lays its shield-shaped
eggs in a double row near the end of a young twig. Next year when the
weather is sufficiently warm to hatch katydids, it is also warm enough
to force the buds on the end of the twigs. When the katydids arrive
their jaws are young and tender, but so are the leaves upon which they
are born. Hence there is little difficulty on the part of the young
katydids in finding an abundance of food. By the time the leaves have
grown tougher, the katydid's jaws are stronger, and the leaves will
still serve as food.

Everyone who is at all familiar with country life and gardening is
familiar with what is called the potato or tomato worm. It is a long,
green, smooth, caterpillar, as long and as fat as your finger and
provided with a horn upon his tail. The gardener may not know that
after a while this creature will burrow into the ground, and there
change into an oblong brown mass with a sort of a pitcher handle at
one side. Next year this pupa will split down the back, and from out
of the brown case will come a hawk-moth, which soon will fly with
rapidly quivering wings and feast upon the nectar of our moon flowers
or on that of the "Jimson" weed. Those who have cleaned these pests
from the potato or tomato vines will often have noticed one of them
covered with what look almost like grains of rice. This appearance
reveals an interesting story. Some time earlier an insect that looked
very much like a dainty wasp with a rather long sting in its tail
hovered over the caterpillar. This is the ichneumon fly. Eventually
lighting upon the caterpillar's back, it punctured the skin with its
sting, and deposited eggs within the caterpillar's body. These eggs
soon hatched and the little grubs worked their way through the body of
its host. The infested victim feeds upon leaves and fills itself with
rich food. These parasites eat the food, and, try as it may, the
caterpillar does not succeed in getting fat. After the grubs have
gotten their full growth, each of them eats its way through a little
hole to the outside of the caterpillar's body. Here it spins around
itself a little white case, and looks like a rice gr