Can"ker*worm`(?), n. (Zol.) The larva of two species of geometrid moths which are very injurious to fruit and shade trees by eating, and often entirely destroying, the foliage. Other similar larv are also called cankerworms.
The autumnal species (Anisopteryx pometaria) becomes adult late in autumn (after frosts) and in winter. The spring species (Anisopteryx vernata) remains in the ground through the winter, and matures in early spring. Both have winged males and wingless females. The larv are similar in appearance and habits, and belong to the family of measuring worms or spanworms. These larv hatch from the eggs when the leaves begin to expand in spring.
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Tue 12th November 2019