Adult larder beetles are dark brown to black, ranging in size from 7 to 9 mm in length, with a pale yellow six-spotted band on the back of the abdomen. The undersurface of these beetles as well as their legs are covered with fine yellow hairs.
Larder beetle females lay 100-175 eggs. These larder beetles eggs will hatch in 12 days or less from the time of being laid. The larvae will eat constantly until it molts. It will molt 5-6 times before pupating. Oftentimes the larvae will burrow into meat or even wood before it pupates. The complete life cycle may be completed within 40-50 days.