I have five incredibly itchy welts on my legs like this one. I got them on Sunday in Samsonville. It's now three days later and they show no sign of dissipating! I have no clue what the bugs were that bit me, as the bites did not hurt when they happened, and they did not itch right away. I was wearing long pants and not doing anything terribly adventurous, just sitting on the deck, with one stroll across the yard.