What's That Bug? does not endorse extermination

I’m hoping you can help me out with a bug identification. We live in York, PA, in a brick house that’s about 150 years old. We have these "creatures" that emerge in various places… I’ve seen them in the basement laundry room– usually when I pick something up off the floor– but also in the living room and dining room, scurrying across the floors or up the walls. They look kind of like the silverfish drawing, but they are longer and thinner, probably a little less than a half inch wide. They range in size from 2-3 inches long, but once I swear I saw one that was at least 4 inches long one time in the basement. They are gray in color, very flat, very fast, with lots of legs, but they don’t seem to have the tentacles off the front and back like the silverfish drawing. I wish could get a picture of one– unfortunately when I see one I’m so darn startled that I end up crushing it to an unidentifiable pulp!!! Any help available? Tricia

Dear Tricia,
You have house centipedes (Scutigera coleoptrata). They are harmless, and actually eat other tiny pests that enter your house. We have some nice photos on our site www.whatsthatbug.com which you can view by clicking the centipede button.

What's That Bug? does not endorse extermination

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