Drugstore beetle (Stegobium paniceum). Coloured scanning electron micrograph (SEM) of a close-up of a drugstore beetle, showing the hairs covering its body. The drugstore beetle is a pest of stored products, including prescription drugs. A symbiotic yeast living in its gut enables the beetle to supplement its diet and therefore live on foods that are poor in nutrients, such as pharmaceutical drugs. Magnification: x470, when printed 10 cm wide.