well I know this isn't bug repellent, BUT if anyone has to be outdoors in BAD bug area's
I will highly recommend some clothing made by a company called BUG Tammer Plus
its a simple thing, a doubl;e layer of mesh like material(wish they made it in colors besides camo)
BUT you can wear shorts under it in summer and stay cool and NO mosquetio can get to you due to the design
I have worn it in a few swamps helping do survey work, and trust me, it works, I would be NO lie covered with about 300+ at a time and never get bit once!, they sell hats, jackets pants and gloves, the whole suit will keep you from ever getting bit
I have mine about 6-7 yrs now, and its a go to thing in bad yrs here when I have to work out in thick area's
here's a link to the jacket, they sell other items too, its the best like design on the market I have ever used or seen too, BUT again, I wish they made it in light colors, to help keep you cooler in the sun, as the camo does seem to hold heat being dark!
https://shannonoutdoors.com/product/classic-double-guard-bug-tamer-plus-parka/