Shawnee, Kansas. Have a basement as a room seen multiple of em .. are they harmful?
It looks like Cheiracanthum mildei, a Yellow Sac Spider. They are common indoor spiders that tend to have waves of generations. You’ll see a lot, then none, then a lot. They do have necrotizing venom that liquifies a tiny bit of skin. Some people can have a bad reaction to the venom. In my own experience with a different species in the same genus, The bites itch really bad for weeks and eventually leave a tiny scar where skin was lost. I was bitten by the outdoors species that acted aggressively. I allow the indoor ones to live their brief… Read more »