well went digging in va, on sat and boke out with welts all over, itches like crazy, thought it was poison ivy or sumac, the back of my neck was iching like crazy, well the hairs or spines were poisonus my buddy looked at my neck and said theres a catapller on yer neck lol watch out for these things http://www.asktheexterminator.com/Caterpillar/Caterpillar_Sting.shtml