Insect and Spider Identification: Do I need to burn down my house because of these spiders??, 2 by Krista45

Krista45 wrote:
At first I saw 1 in the basement, assumed it crawled in through a window. Didn't seem to have a web anywhere just scurried under the dryer. Now I've found a few dead ones and one terrifyingly large one. Only in the basement though. Any ideas. Thoughts? If they just chill and eat mosquitoes and what not that's fine but I'm terrified of an infestation. I live in Newtown CT. Midwest CT. HELP the image of the spider next to the bottle cap is to show size(dead) the others are of a living one that was much bigger and did not have the same striped body