General Facts

Centipedes are elongated, flattened arthropods with numerous legs – one pair per body segment. They are predaceous on many different arthropods including insects. Although all centipedes have poison glands and the means to inject their venom, bites are infrequent and normally do not cause more than temporary, localized pain.

Most centipedes can be found under boards, logs, rocks and other protected, damp locations outside. These centipedes are of little concern to homeowners. The house centipede, believed to have originated in the Mediterranean region, was introduced into Mexico and the Southern United States and has increased its distribution. It was first recorded in Pennsylvania in 1849. Today, the house centipede can be found in many buildings throughout the United States.

The house centipede adult has 15 pair of legs with the last pair (on adult females) nearly twice the length of the body, which is one to one and one-half inches in length. This gives the centipede an overall appearance of being from three to four inches in length (including legs and antennae). The legs are banded light and dark, and the body is a dirty yellow with three longitudinal, dark stripes. Newly hatched larvae (rarely seen) have four pair of legs. During the next five larval molts, the centipedes will have 5, 7, 9, 11 and 13 pairs of legs. On the next molt the centipede is considered an adolescent and will have 15 legs during each of the next four molts – when it becomes an adult.



Reduction in the centipede food source is the first step in managing a house centipede population. Determine what other types of arthropods, in your house, are providing a meal for the centipedes by distributing ‘sticky insect traps’, also called monitors, around the house. These monitors (and the service for identifying the specimens) can be obtained through a pest control company.

Harborage reduction is the second most important management tactic. Close, with appropriate fillers, cracks and crevices in concrete slabs and block walls. Seal the covers to sump pumps with screen and caulk. Install window screen in basement floor drains to prevent centipedes from entering from dry sumps.

Reduce the humidity by utilizing dehumidifiers. Grade the soil around the building to facilitate water movement away from the foundation.

Insecticides that are effective for centipedes and labeled for use in the home are formulated as either emulsifiable concentrates or wettable powders that are mixed with water for application as a spray, or as dusts.

Sprays that are available for homeowner use include many of the synthetic pyrethroids such as cyfluthrin, deltamethrin, lambda-cyhalothrin, cypermethrin, permethrin or tralomethrin

Dusts are either boric acid or diatomaceous earth – both which are inorganic insecticides and have very low risk to mammals.

Sprays or dusts should be applied to sites where centipedes are suspected such as cracks and crevices in concrete slabs, block walls, etc.