Aphasmaphleps, a new genus of long-legged flies from Senegal, with a key to the genera of Afrotropical Diaphorinae (Diptera: Dolichopodidae) Grichanov, Igor Ya. African Invertebrates 2010 2010-12-31 51 2 405 405 87CGQ 92571 Schiner 1864 [724,862,1132,1158] Insecta Dolichopodidae Animalia Diptera 4 412 Arthropoda subFamily Diaphorinae    1 Costa not extending beyond tip of R 4+5; distal vein M gently sinuate or broken or weakened, with distal section often displaced .......................................................2  – Costa extending beyond tip of R 4+5, usually ending at apex of vein M; vein M unbroken, rarely weakened ....................................................................................5   2 Vein R 4+5ending along distal anterior wing margin, well before wing apex; distal parts of R 4+5and M 1+2strongly diverging...............................................................3  – Vein R 4+5ending almost at wing apex; distal parts of R 4+5and M 1+2subparallel, slightly diverging or bowed with respect to each other .........................................4   3 Upper part of proepisternum with 2–4 fine setae; acrostichals usually present; male sternite 8 often with strong projecting setae ......................  AsyndetusLoew, 1869  – Upper part of proepisternum usually bare; acrostichals absent or microscopic; male sternite 8 without strong setae..............................  CryptophlepsLichtwardt, 1898   4 Acrostichals biseriate; male antenna very long (4/5 the body length); male fore and mid tarsi modified; male sternite 8 with 2 strong projecting setae .......................... ...........................................................................................  Aphasmaphleps gen. n.  – Acrostichals absent; male antenna about as long as head height; male fore and mid tarsi simple; male sternite 8 without strong setae; western Pacific.......................... .................................................................................[  PhasmaphlepsBickel, 2005]   5 Occiput concave; antennal postpedicel usually pressed laterally, bladelike to subtriangular, with distinct apex and dorsal to dorsoapical arista-like stylus.............6  Figs 8, 9. Habitus of  Falbouria acorensis( Parent, 1933)and its head, holotype. Scale bars: 1 mm (Fig. 8), 0.5 mm (Fig. 9).  – Occiput convex or flat; antennal postpedicel usually globular, reniform, conoid or budlike, with indistinct apex, or with slender apical projection, and with subapical or apical, rarely dorsal, arista-like stylus inserted sometimes in apical incision ...8   6 Hind coxa with external vertical row of 3 or 4 setae decreasing in length ventrally; scape with dorsal setae (bare in some Holarctic species) ........................................ ...........................................................................................  ArgyraMacquart, 1834  – Hind coxa with one external seta at basal quarter; scape bare...............................7   7 Wing vein M 1+2with rather distinct sinuation at 2/5 of distal part; arista-like stylus dorsal; antennae positioned at upper quarter of head; male segment 7 rather long .........................................................................................  UrodolichusLamb, 1922  – Wing vein M 1+2nearly straight; arista-like stylus dorsoapical; antennae positioned at middle of head; male segment 7 short; Azores .................................................... ........................................................................... [  Falbouria Dyte, 1980; Figs 8, 9]   8 Posterior four femora with anterior subapical seta in both sexes; male frons and face broad...............................................................................................................9  – Posterior four femora without distinct anterior subapical seta, at most with stiff hairs; male eyes usually convergent or contiguous above or below antennae.....10   9 Antennal pedicel with finger-like projection overlapping postpedicel; male sternite 8 with strong projecting setae ......................................  DactylonotusParent, 1934  – Antennal pedicel without finger-like projection; male sternite 8 without strong setae.........................................................................  NurteriaDyte & Smith, 1980   10 Acrostichal setae absent; female clypeus with four projecting setae; male segment 7 rather long; postgonite prominent, often with a group of pedunculate setae........ ..............................................................................................  AcropsilusMik, 1878  – Acrostichals present, biseriate; female clypeus without setae; male segment 7 short; postgonite reduced ...............................................................................................11   11 Antennae positioned at middle of head; upper part of proepisternum with 2–4 fine setae; wing usually broadest at basal quarter, with nearly straight R 4+5and M veins ...............................................................................  DiaphorusMeigen, 1824  – Antennae positioned at upper quarter to third of head; upper part of proepisternum usually bare; wing usually broadest at middle, with convex anteriorly R 4+5and M veins .....................................................................................................................12   12 Face nearly parallel-sided, subequal in width to frons; male postpedicel budlike, with abruptly drawn-out apex; male sternite 8 with strong projecting setae; hypopygial surstylus and epandrial lobe long and thin; male cercus with long distoventral projection ......................................................................  TrigonoceraBecker, 1902  – Male eyes convergent or contiguous below antennae; female face distinctly narrowed downwards; male postpedicel globular, reniform, conoid (  Chrysotus) or with slender apical projection (  Achradocera); male sternite 8 with simple hairs, rarely with short thick setae; surstylus and epandrial lobe broad; male cercus without distoventral projection .............................................................................................................13    13 Malepostpedicel with slender apical projection bearing apical arista-like stylus, and lower postocular surface of male with many flattened pale setae ..................... .....................................................................................  AchradoceraBecker, 1922  – Male postpedicel globular, reniform or conoid with subapica1 arista-like stylus; lower postocular surface with fine unmodified setae......  ChrysotusMeigen, 1824