Florida Dept. of Agriculture issued the following announcement on July 16.
Your lychee tree may have mites
The Florida Dept. of Agriculture says there's a mite that's damaging lychee trees in Palm Beach County. The lychee is a subtropical fruit tree that produces bright pink–red fruits with a sweet flavor. If you have a lychee, please see this alert and notify FDACS if your tree is affected.
Original source can be found here.