robber fly (Promachus yesonicus)
attempting two tasks at the same time, accomplishing neither; falling between two stools; (lit.) catching neither the horsefly nor the bee
horsefly and bee; horsefly and wasp
deerfly (Chrysops suavis)
Tabanus trigonus (species of horsefly)
robber fly (any fly of family Asilidae)
hoverfly (Syrphidae spp.); syrphid; drone fly (Eristalis tenax)
Tabanus chrysurus (species of horsefly)
bee fly (any insect of family Bombyliidae)
soldier fly (any fly of family Stratiomyidae, esp. species Stratiomys japonica)