Three new species of Rhaphium Meigen, 1803 from mangroves in Hong Kong (Diptera: Dolichopodidae: Rhaphiinae) Author Grootaert, Patrick Author Taylor, Christopher Author Guénard, Benoit text European Journal of Taxonomy 2019 2019-07-30 540 1 21 journal article 26099 10.5852/ejt.2019.540 2d33c675-52ef-4bf7-a1d0-884df2d2e8c4 3357392 88E89839-8631-490D-92F8-526A65F387A3 Genus Rhaphium Meigen, 1803 Type species Rhaphium macrocerum Meigen, 1824 . Diagnosis Rhaphium may be recognised by the following features ( Tang et al. 2016 ): vertex flat; ocellar seta nearly as long as vertical seta; face distinctly narrower than frons; clypeus not distinctly separated from face; antenna black, postpedicel elongate, 2 to 8 × as long as wide, arista apical; propleuron without distinct bristle but with dense white hairs; hind coxa with or without an exterior bristle near middle; mid and hind femora both with preapical bristle(s); wing vein M straight and not bifurcated, R 4+5 apically parallel with M or slightly convergent, CuAx ratio less than 1; abdominal segments 1–3 usually with long pale hairs, segment 6 visible and hairy; male terminalia small, connected tightly with pregenital segment, hidden in apex of abdomen, cap-like, cercus long and narrowed towards tip, with hairs and bristles.