This is a house centipede. It is not a true insect but it is an insect relative. Centipedes have a flattened body and 15 pairs of long legs (one pair of legs per body segment), and they move quickly.
Where does it like to live?
House centipedes typically live outside under leaves, mulch, loose bark, rotting logs, and other types of moist sites. They can also become common inside buildings. Because they prefer damp conditions, they are often found in basements, bathrooms and similar places. They like to hide in cracks, crevices, and under or behind items. House centipedes can survive winters indoors, although there are usually only just a few of them. They are more common in homes as the weather warms up during spring and they enter homes from the outside.
Is it harmful to people?
Despite their quick movement and their fierce look, house centipedes are essentially harmless to people. It's possible if you held one and squeezed it, a house centipede might try to bite you. However, its jaws are weak and bites are rare. A bite would feel similar to a bee sting.
What is the best way to control it?
If damp conditions exist where centipedes are common, dry out that area. When possible, remove clutter, boxes, bags, accumulations of laundry, etc., which can encourage centipedes. Kill centipedes with a broom, newspaper or similar means as you seen them. You can also put out sticky traps (like for cockroaches) to help capture house centipedes. If large numbers of them are present, you can also use household insecticides. Spray in areas where centipedes are commonly seen, especially in cracks and crevices. However, use insecticides sparingly. Also check outdoors for any changes you can make to the landscape that will discourage house centipedes.
