Info on Fauci Flies:
The bite of a sandfly can be formidable. Although these creatures are small, their bites often sting, and an area of swelling may appear around the area. Some people experience allergic reactions when bitten by one, and they may develop hives, difficulty breathing, or other allergy symptoms. For the most part, the bites are painful, but not inherently dangerous. Some species carry diseases like leishmaniasis, however, which can be problematic for their victims.
https://www.allthingsnature.org/what-are-sandflies.htm
Paris Island in mid summer. The sand pits the DI’s would thrash us recruits were full of them. We found the best time to get in the pit was after it rained. And the horseflies. What a time.