Is the flash being used as fill light? With flash as key I would look in the manual to find the actual flash duration at different power levels. With flash as fill you'll need HSS and, gosh, maybe 1/2000 to stop bee wings.
I don't see any exif data so I don't know what ISO this is but it looks pretty low from what I can tell. Without using a flash, I would open up the aper as much as possible to let in more light on the subject and not worry about the bg being in focus and maybe bracket with different apers if the aper is too shallow on the bee itself. Definitely increase the s.s. Do some bracketing with s.s. also to see what looks best for the light at hand. GL!