They must use some sort of comms but not as sophisticated as Honey bees.
This is easy to see as NigelP has eluded to this as well, I leave my extractor and empty but wet uncapping's bowl on the patio for washing out. Prior to washing I leave out on a nice day for the bees to mop up all honey residue and they turn up mob handed and out number wasps by a huge factor, even wasps like a free meal, honeybees number in the 100's, wasps < 15 and bumbles < 5 are the numbers I roughly see.