We have what is locally called a sweat bee, probably a deer fly species, that will stay with you riding or running and they call all their little sweat bee buddies to come and dine on you with them. They also bite right through bibs, jerseys and running shorts like it isn't even there. When I used to finish running the road at UWF (very wooded and several streams) I'd be covered in red dots form all the bites. Left the road or trail numerous times and ran into the library of field house.
Bill