Mostly to Walter Farina-
 
		I have caught several (and observed numerous) Mallophora
orcina catching honey bees in bee yards in North Carolina.  It is a common
species across the southern U.S.  It is also a beautiful bumble bee mimic.
		I have also observed another robber fly, Promachus rufipes,
catching honey bees.
		That is as close as I can come to M. ruficauda.