Grub, in Zoology, the English name for worms, or maggots, hatched from the eggs of beetles.

Grubs are an excellent bait for many kinds of fish. In angling for the grayling (see Umber) as well as trout, the ash-grub is pre-ferable to all others. This insect is of a milk-white colour, a plump round form, with a red head. There is another very common grub, which is longer and thinner than the ash-grub ; has also a red head, but two rows of legs along the belly ; it is tougher and yellower. To preserve grubs, they should be kept in bran, which will render them very firm ; but the ash-grub is always so tender, that it can with difficulty be employed as a bait: hence, it should be wrapped in a piece of stiff hair with the arming, and about a straw's breadth left to project at the head of the hook, to prevent the grub from sliding off, when baited. The horse-hair must be white, or of a colour perfectly resembling that of the bait; as otherwise it will be suspected by the fish. - For the different methods of destroying grubs, in general, see Chafer.