The Drugstore beetle (Stegobium paniceum), also known as the Bread beetle or Biscuit beetle, is a tiny, brown beetle that can be found infesting a wide variety of products, and is among the most common non-weevils to be found there. It is the only member of the monotypic genus Stegobium.
They have a worldwide distribution and can be more commonly found in warmer climates. They are similar in appearance to the Cigarette beetle (Lasioderma serricorne), but are slightly larger (adults can be up to 3.5 mm in length). Additionally, Drugstore beetles have antennae ending in 3-segmented clubs, while Cigarette beetles have serrated antennae (notched like teeth of a saw). The Drugstore beetle also has grooves running longitudinally along the elytra, whereas the Cigarette beetle is smooth.