The Collaborative International Dictionary
bee fly
bee fly \bee" fly`\ (b[=e]" fl[imac]`), n. any dipterous insect of the family Bombyliidae, which eat nectar and in some cases resemble bees. Their larvae are parasitic on the larvae of bees and other insects.
WordNet
bee fly
n. hairy nectar-eating fly that resembles a bee; larvae are parasitic on larvae of bees and related insects
Usage examples of "bee fly".
All at once he saw a great bumble-bee fly out of one of the tulips.
Synton took his hat off his pale, thinning hair, and let the bee fly out.