They sound like what we in NW Florida call "No see 'ums", not sure what the actual genus and species are but the little devils can take over an area. We have had to put off work in some areas of our construction job sites on the various Naval Bases here, you cannot just spray any insecticides when on the bases. Sorry you have had the run ins with these evil creatures, just a part of Florida life.
Bill
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Semper Fi, USMC, 1975-1977
I Can Do All Things Through Him, Who Gives Me Strength. Philippians 4:13