I see these little buggers in our basement bathroom about every other day. I know they're a common house spider, but what specifically are they? I usually just leave them be, or maybe catch them in a cup, then release them into the furnace room a yard or two away....that is if Larry the cat doesn't see it first, then it's an evidently tasty kittty treat. This one in there tonight might have a leg spread that would cover a quarter, not very big, but these things can run like hell when they want to. I often find them trapped in either the plastic sink or bathtub. It's strange that they can't get any grip on that material and helplessly slide back down the sides when they try to get out, you'd think they could climb on anything.