The weevils are mostly quite small beetles in which the front of the head id drawn out to form a beak or rostrum with the jaws at its tip. The antenna are elbowed and normally attached part way along the rostrum. The elytra are often clothed with scales. Many species are flightless and their elytra are commonly fused together. The majority of weevils are vegetarians, their larvae mostly without legs and generally living inside the stems, fruits, seeds of their food-plants. There are nearly 600 British species, arranged in several families.
Pea Weevil Sitona lineatus
The conspicuous light and dark stripes on the elytra distinguish this from several otherwise similar species. Abundant in grassy places, the adults nibble semicircular holes in the edges of the leaves of peas, clovers and other legumes. The larvae live in the root modules of these plants. All rear, often swarming on sunny walls and fences before overwintering in the turf.
Collins Complete Guide to British Insects by Michael Chinery