Harvest mite, the cause of "chigger bites," mites in the family Trombiculidae that live in North American forests and grasslands
i had them when i was a youngin way back..lol i played a lot in heavy pine-needle covered woods, thats where i got them,, the kind where the fallen needles are inches deep and the ground is real soft..
what i recall is they get inside your skin and burrow through leaving a vain-looking rash where ever they traveled... don't recall pain but alot of scrathy annoying rash...