Behold the chelicerae of a Karsch's purseweb spider (Atypus karschi). Not something you often see because the spiders are hidden away inside their silken tubes, but this exuvium was at the base of my persimmon tree yesterday. I've read that they include earthworms in their diet. #spider #spiders #mygalomorphae #nature #delco #DelawareCounty #pennsylvania