Walking around my yard this afternoon temp. about 55 bees were out and about, saw a dying bee on a top cover checked it out and saw a live mite leaving the bee, squashed it then picked up the bee to have a good look at it and found another mite clinging to it sqashed that one too. All my hives have been treated with formic acid . so I guess that I am going to struggle with these critters until I can get sufficient genetic change into my hives.