Q.Tree mites
We sprayed for mites and now find we have an abundance of what appears to be flying baby bees. Are they bees or something else that will harm our trees?

It is difficult to determine the insect you are referencing with your description.
If you can give more information or include images, we can help further.
You can also check with your County Extension Office in your area.
This link will help you find your nearest office.
https://www.gardeningknowhow.com/extension-search/