Peduncles long, one-flowered, often aristate. Antennae are three-segmented and aristate. Adults have stout, tapered abdomens with slightly elongated legs, with aristate antennae. The shape of the leaf is aristate. They are aristate flies, and the arista usually is bare, though sometimes plumose. The filiform, stylate or aristate antennae correlate with the Nematocera, Brachycera and Cyclorrhapha taxa respectively.