虻 - gadfly, horsefly

horse botfly

bee fly (any insect of family Bombyliidae)

horsefly and bee; horsefly and wasp

horsefly; gadfly

attempting two tasks at the same time, accomplishing neither; falling between two stools; catching neither the horsefly nor the bee

hoverfly (Syrphidae spp.); syrphid

deerfly (Chrysops suavis)

robber fly (any fly of family Asilidae)

Tabanus trigonus (species of horsefly)

Tabanus chrysurus (species of horsefly)

soldier fly (any fly of family Stratiomyidae, esp. species Stratiomys japonica)