“There are numerous species, and each species is represented by
countless legions of individual moths. Some of these attack fruit; I
have just told you about the principal ones. Others have a different
mode of life, and of these I will speak to-morrow. But they are all
very small moths, and some are beautifully colored. Their antennæ are
fine and their wings, rounding at the shoulders, spread out in the form
of a cape and are folded together in repose like the two halves of a
sloping roof; that is, they incline to right and left. Their grubs have
a smooth and shiny skin. These worms draw back quickly when molested
and let themselves fall to the ground, deadening the shock of the fall
by means of a silk thread that holds them suspended by the lip.”
“That’s a clever trick,” Emile observed. “As soon as the worm is
frightened it glues the end of the thread to something and down it
drops, but gently and only as fast as the thread is let out by the
spinneret.”
“This morning,” said Jules, “Mother Ambroisine was picking over some
dried peas. A few were pierced with a round hole, and others had a
little brown insect spotted with white. Peas, then, have two enemies:
the pyralis-worm that eats fresh fruit and the insect I am speaking of
that eats them dry.”
“The insect that eats dried peas is a small beetle, a weevil with a
wide and very short snout. It is known as the pea-weevil. Another
weevil eats beans, and still another lentils. It is always the larva
that does the mischief. Once arrived at the perfect state, the weevil
bores a round hole in the seed and gets out. These weevils have the
same habits as the grain-weevil. They are destroyed by the use of
sulphide of carbon, or simply by the action of heat if the seeds they
infest are not to be sown, for the temperature required to kill the
insects and their larvæ would also destroy the germinative principle of
the seed.”
CHAPTER L
LEAF-ROLLERS
“Many of the moths bearing the name of pyralis have a curious habit in
their larva state, of rolling up the leaves of trees, or of folding
them lengthwise, or of uniting several in the form of a sheath by means
of silk threads, so as to make a shelter in which they may nibble away
in safety at the interior of their green abode. For this reason they
are called leaf-rollers. The one best known, on account of the damage
it does, is the grapevine-pyralis.
Public-domain text, read in full here on John Shaqi.
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