Arachnids (Spiders & Scorpions) American House Spider Posted by Long Leggedy Beasties on May 27, 2019May 27, 2019 American house spider (Parasteatoda tepidariorum). American house spider (Parasteatoda tepidariorum). Maybe an inch long if she stretched out. The freeform, “messy” web is characteristic of the species. Share this:FacebookRedditTwitterTumblrPinterestLike this:Like Loading... Related