Subfamily Dolichopodinae Latreille, 1809

Type genus: Dolichopus Latreille, 1797 .

The Dolichopodinae includes the following genera: Allohercostomus Yang, Saigusa & Masunaga, Anasyntormon Parent, Argyrochlamys Lamb, Cheiromyia Dyte, Dolichopus Latreille, Gymnopternus Loew, Hercostomus Loew, Metaparaclius Becker, Muscidideicus Becker, Ortochile Latreille, Paraclius Loew, Parahercostomus Yang, Saigusa & Masunaga, Pelastoneurus Loew, Platyopsis Parent, Poecilobothrus Mik, Prohercostomus Grichanov, Stenopygium Becker, Sybistroma Meigen, Tachytrechus Haliday, and New Genus A. Four genera have been removed from the Dolichopodinae as defined here: Colobocerus Parent, Katangaia Parent, Pseudohercostomus Stackelberg and Ve t i m i c ro t e s Dyte (see “Genera Removed from the Dolichopodinae ”).

Recognition. This subfamily is distinguished from other dolichopodid subfamilies based on the following combination of characters: scape setose dorsally; mid and hind femur with 1 or more anterior preapical setae; male abdominal T6 bare, rarely with setae on lateral margin; male segment 7 bare, forming a peduncle; hypopygium folded under abdomen.

Description. Head: Occiput convex; 1 pair of divergent ocellar setae, usually strong; 1 pair of vertical setae; antennae inserted above middle of head; scape dorsally setose, usually with acute medioventral process; pedicel with fine setae on apical margin; pedicel condyle present, well­developed, inserting into base of first flagellomere, occasionally weakly developed in some males with modified antennae; eyes with ommatrichia, often slightly longer below; postocular setae uniseriate; 1 pair of postvertical setae.

Thorax: Acrostichals usually biserial, sometimes uniserial or absent; 5–7 dorsocentrals; postpronotum with 1 strong medioclinate seta and 1 or more weaker outer setae or hairs; 1 outer posthumeral, and usually 1 weaker inner posthumeral; 1–2 notopleurals; presutural seta and sutural seta usually present, occasionally absent; 2 supraalars; 1 postalar; lower part of propleuron with 1 prothoracic seta. Scutellum with 1 strong inner seta and usually 1 small outer seta on lateral margin.

Legs: Mid femur with 1–5 anterior or anterodorsal preapical setae, rarely absent in male; hind coxa with 1 strong lateral seta; hind femur with 1–10 anterior preapical setae.

Wing: Costa continuous to M; M straight or with weak to strong anterior or S­shaped bend, ending near or before wing apex, usually unbranched, occasionally with stub vein.

Abdomen: T1–5 setose. Male: T6 usually bare, rarely with setae on lateral margin; pregenitalic sternites partially to entirely membranous, often forming a concavity for hypopygium; segment 7 bare, tergite and sternite forming ring­like or tubular peduncle; hypopygium usually large, folded under abdomen. Female: Segments 6–10 telescopic, T10 with spines.