 Some attack their hosts while flying, darting down to lay their eggs; others land, curl their ovipositor under their bodies and rush their hosts on foot (as in "M. acoma", see photo); a few carefully land on their host and stealthily inject their egg.The flies can be attracted by spraying a mixture of honey and water on undergrowth to attract an aggregation of host bees.Frequently, they are found on palm tree flowers (again, with host bees), and sometimes they are encountered around bee nests.