Mosquito-like, fragile, large flies with a V-shaped suture on the mesothorax. No ocelli. Complete wing venation.
Black and white banded (at least in the common genus Bittacomorpha). 1 anal vein reaching margin. No closed discal cell.
Hairy flies. Pointed wings held roof-like over abdomen. Veins parallel, few crossveins. No ocelli.
Often have pterostigma. Short antennae, low on head. Complete wing venation. Tibial spurs present. Legs often bristly. Ocelli present, clumped together.
Mosquito-like, pale flies. Some have long antennae. Ocelli present but hard to see. Coxae very long, nearly as long as femora. Tibial spurs present.
Small, mosquito-like flies with darkened wings. Ocelli present. "M" distinctly forked. Reduced venation, no discal cell. Eyes meet on top of head.
Small to very small fragile flies with long legs and antennae. Weak, very reduced wing venation. Eyes meet on top of head. Ocelli absent.
Slender, delicate flies with elongate mouthparts that form a beak. Scales on wings, body and legs. Long palpi, especially in males.
Small, stout, dark, humpbacked flies. Short, moniliform antennae. Legs short and stout. Large anal area in wing.
Mosquito-like flies, but without beak. Elongate front legs, narrow wings. Males with plumose antennae. No scales or hairs on wing. "M" unbranched.
Small to very small robust flies. Wings held horizontally, often patterned. Long antennae. Ocelli absent. 2 "M" branches.
Medium to large flies. Terminal segment of antennae annulated. Empodia pulviliform. Large calypters. R4 & R5 divergent, enclosing wing tip.
Slender flies with pointed abdomen. Antennae with long style. Empodia puliviliform. Wing with 5 posterior cells.
Long-lived flies with bristle-like empodium. Rs 3-branched, 5 posterior cells. Eyes often holoptic. Antennae with short style, or annulated.
Flies that are often mimics of bees or wasps. Prominent antennae with 3rd segment distinctly annulated. Small discal cell. R crowded to anterior margin. Empodia pulviliform.
Large, robust flies with elongate pointed abdomen. Top of head concave (sunken vertex). Hairy body, "moustache" present. Empodia bristle-like. Rs 3-branched.