The =Pea Weevil= (_Sitones lineatus_). Longish, with grey scales on a black background. Neck-shield with three longitudinal streaks, wing-covers with dotted lines. These weevils appear at the first beginning of spring on peas, field and garden beans, clover, and vetches. They gnaw the leaf-margins of the tender plants, and always in such a way as to present a toothed appearance (Fig. 78). It often happens that in a large field one can scarcely find a pea-leaf with uninjured margin. When the plants are somewhat grown the damage done by the weevils is of no further importance; but if the plants, when still very young, are prevented from growing rapidly by reason of rough cold weather or unfavourable conditions of soil, while at the same time the weevils continue their attacks, the small leaves will be completely destroyed, and the plants will perish. The larvæ gnaw the roots of the plants infested by the weevils. _Remedy_: rational rotation. The =Mouse-tooth Weevils= (_Baris_, or _Baridius_). Small, tolerably elongated weevils with fairly long neck-shield (Fig. 79). Develop in cruciferous plants. The =Rape Mouse-tooth Weevil= (_B. chloris_). Shining green. Leaves in spring its hiding-place in the soil; the female then lays her eggs in the leaf-axils or stem of rape or turnip. The larva eats out passages in the stem and branches; in July it becomes a pupa in the inside of the stem; in late summer the beetle appears, and quickly creeps into the soil. _Remedy_: Pulling up and burning the rape and turnip stubble, which harbours the weevil. The =Pitchy Mouse-tooth Weevil= (_B. picina_), one-sixth of an inch long, shining black. Similar habits to the previous species; but lives exclusively in headed cabbage and cauliflower, never in rape and turnip. The =Cress Mouse-tooth Weevil= (_B. lepidii_), black with blue or greenish-blue back, one-eighth of an inch long. Lives in the stems of cauliflower and garden cress. [Illustration: FIG. 79.—Mouse-tooth Weevil (_Baridius chloris_). 1, _larva_; drawn on the left, natural size,—above, the magnified head: 2, _pupa_, magnified: 3, _beetle_; drawn of the natural size above: _a._, eye; _g_, antennary groove with antenna not drawn back. ] [Illustration: FIG. 80.—Turnip Gall Weevil (_Ceutorhynchus sulcicollis_). ]