Chersodromia nigripennis Shamshev & Grootaert, 2005c: 3 The fast-running flies (Diptera, Hybotidae, Tachydromiinae) of Singapore and adjacent regions Grootaert, Patrick Shamshev, Igor V. European Journal of Taxonomy 2012 2012-01-06 5 1 162 TY7K Shamshev & Grootaert, 2005 Shamshev & Grootaert 2005 [459,1129,1895,1923] Insecta Hybotidae Chersodromia Animalia Diptera 35 36 Arthropoda species nigripennis   Figs 58-62      Chersodromia nigripennis Shamshev & Grootaert, 2005c: 3.    Diagnosis Rather small species (about 2.0 mm) with 2 pairs of vertical bristles; very narrow face; black antennae; conical postpedicel with apical stylus; brownish palpi, halters and legs, and usually deeply infuscate wings.    Material examined  SINGAPORE: 1 ♂, Chek Jawa, 12 September 2005, mangrove, sweeping (reg. 25343, leg. P.G.); 2 ♀♀, Chek Jawa, 15 December 2005, mangrove, sweeping (reg. 25452, leg. P.G.); 2 ♂♂, 2 ♀♀, Sungei Buloh (SBWR01), 19 May 2009, mangrove, Mal. (reg. 29073, leg. P.G.).    Distribution  Singapore.   Seasonal occurrence and habitat On beaches in front of mangroves; with flight records in March, May, September, and November- December (most records).    Remarks This species is likely to show dark-winged (most common) and pale-winged forms. We supposed that the dark wings are a local homochromatic adaptation as a camouflage on a black background. The paler specimens might have an advantage on the white sandy patches ( Shamshev & Grootaert 2005c).  Chersodromia nigripennisappears to have an intermediate position between the  C. incanaand  C. cursitansgroups ( sensu Chvála, 1977).