We have had a sudden infestation of bugs on three occasions, about 4 months apart. The bugs show up in one area of the house (the same area each time) in a matter of minutes. They are about a quarter of an inch long including their wings, a thin black body about as big as a little picnic ant, with white wings that are folded back against their body and are twice as long as their body. They show up in large numbers on the floor, on the furniture, and even in the sink. They sometimes are on the walls, but don't seem to fly around, just crawl around for a brief time and then die. We vacuum them up, and they stop coming around after about an hour and we don't see them again for another few months. We live in South Georgia, very close to Florida. The room where they show up is carpeted, but the carpet has been cleaned several times. They don't seem to be coming in from outside, although there usually are quite a few on the window sill. We thought they might be sewer bugs coming up through the drain, but have learned that sewer bugs don't have wings.... Has anyone else had an experience with these little bugs?