Small beetles, with stout, rounded oblong bodies, generally greyish brown or dark grey with mottled patterns, hardened front wings that form a shell over the top of the body) with flattened ends, which do not cover the tip of the abdomen. Head is small, black, and bent downwards. Entire body is clothed with fine, short hairs. Adults bore into seeds, and feed on the contents. Neat, circular exit holes can be seen on damaged seeds. Heavy infestation causes the stored beans to heat up, resulting in mould growth, and change in taste. They can chew plastics and paper bags to reach stored foods.