Grub

Grub, a name generally applied to the worm-like larvæ of insects when they have a distinct head but no legs—e.g. in bees and some beetles. In distinction therefrom, a larva without distinct head and without limbs, as in Diptera, is a maggot, but with distinct head and limbs, anterior as well as posterior, is a caterpillar. But these are all somewhat rough and ill-defined titles, now replaced by a more exact terminology (see INSECTS and LARVA). The economic importance of many grubs, especially those of some beetles, is well known. See CORN INSECTS.