Thanks FF, but it is a shower and AC drain sump of less than a gallon of water in it AFTER the pump runs. The rest of the bilge is DRY. The message from Gabe N Em has proven to be the answer to my Question as to what they are.Drain Flies and I bet more than one of us have had them at one time or the other. Thanks to Gabe!!!! I now know what they are. Another suggestion was to use kerosene to kill the larvae instead of a harmful petroleum product I will pour a little used olive oil to float on top. Let us close this adventure and move on please.
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