Do y'all get Mayflies? I had never encountered them that I know of, before moving here. They descend en masse usually at the beginning of May, much like the june bugs do later on. Some early arrivals have been here for a week or two, but the full army has now arrived. They get in any crack, and in this house, there are quite a few cracks. I'll be sweeping around the doors and windows for days now. Here's what it looked like in my area last night.