Harrier Pest Control

Larder Beetles

Larder Beetle

Larder Beetle

The larder beetle, Dermestes lardarius, is an easily identified beetle often associated with a build up of animal matter or a sign of poor housekeeping. This beetle is also often associated with the presence of birds’ nests.

The larder beetle, Dermestes lardarius, larva is longer than the adult larder beetle and thickly covered with short and long setae which are reddish-brown to black in color. Along with the coloration is a white undersurface.They also have two spine-like appendages on the posterior end on the abdominal segment. A distinguishing feature of the spine is that it curves backward. The black larder beetle larvae possess the same general characteristics but instead of the spines curving, they extend backward and are not strongly curved. Mature larvae of both species tend to bore into hard substrates such as wood, cork, and plaster in order to pupate.

Larder Beetle Larvae

Larder Beetle Larva

Larder beetles are infrequent pests of households.Both adults and larvae feed on raw skins and hides. Adult larder beetles are generally 1/3 to 3/8 of an inch long and are dark brown with a broad, pale yellow spotted band across the upper portion of the elytra. Three black dots arrange in a triangle shape on each wing. The sternum and legs of the larder beetle are covered in fine, yellow setae. Adult larder beetles are typically found outdoors in protected areas during the winter but during the spring and early summer they enter buildings. Females lay approximately 135 eggs near a food source and will hatch in about 12 days. The life cycle of larder beetles lasts around 40 to 50 days.

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