Rhaphiinae

Naglis, Stefan & Grootaert, Patrick, 2011, A remarkable new species of Rhaphium Meigen (Diptera, Dolichopodidae) from Sri Lanka, Zootaxa 2991, pp. 44-48 : 45

Key to Oriental genera of Rhaphiinae

1. Antennal scape bare dorsally; fronto-clypeal suture obscured; seta present between postverticals and postoculars; posterior mesonotum not flattened; vein M2 absent; crossvein dm-cu shorter than distal section of CuA; anal cell present; mid femur usually with anterior and posterior preapical seta; male hypopygium at least partially exposed or pedunculate; male sternite 8 without strong setae; hypandrium strongly reduced........................................................... 2

- Without the above combination of characters.................................................... non Rhaphiinae

2. Veins R4+5 and M strongly converging before wing tip; first flagellomere at least 5 times as long as high in males and females......................................................................... Ngirhaphium Evenhuis & Grootaert

- Veins R4+5 and M subparallel; first flagellomere various...................................................... 3

3. Arista apical, subapical or absent........................................................... Rhaphium Meigen

- Arista distinctly dorsal................................................................................ 4

4. Body light metallic green; lower postocular setae multiseriate; male cercus ribbon-like............. Nematoproctus Loew

- Body dark metallic brown or black; lower postocular setae uniseriate; male cercus various............................ 5

5. Acrostichal setae biseriate; 5 dorsocentral setae present; abdominal segment 7 in males forming long peduncle.................................................................................................. Urodolichus Lamb

- Acrostichal setae absent; 4 dorsocentral setae present; abdominal segment 7 in males as short peduncle.................................................................................... Haplopharyngomyia Meuffels & Grootaert