That’s it, Brady. It was posted in a Houzz topic several years ago and I could not remember the insect type. Thanks for the lead.
Of the Psocoptera, the ncdabbler insect most resembles an “Outer Barklouse”, family Ectopsocidae.
https://bugguide.net/node/view/141062/bgimage?from=24
They feed on a variety of decaying matter. They would not be a pest of citrus, and they may not be responsible for the other insect activity on the mandarin leaves, they would be looking for byproducts of that activity, like ants do with aphids, for example.
Thanks for the pictures of the captured specimens; the two pairs of wings rules out the huge Diptera (fly) Order that have only one pair of wings.