pea bug

noun2

1. •
   (informal) Any of several small beetles of the genus Bruchus which destroy pea plants; a pea weevil.
2. •
   (informal) A woodlouse (Oniscidea spp.).

   • Morning, with rain in the sky, and the forest subtly brooding, and me feeling no bigger than a pea-bug between the roots of my fir. — 1923