I had those too Al They were all over my patio - they were all dead I remember it from last year too - it must be a hatching. They are starting to be fewer and far between now. The water fleas were different - they stayed alive in the water, and looked like black dust. Really gross! They went away too. Oh the wonders of living in the woods Good thing bugs don't bother me too much - now dead animals in the pool are another story