A revision of the genus Mesoconius Enderlein (Diptera, Micropezidae, Taeniapterinae) Author Marshall, Stephen A. text European Journal of Taxonomy 2019 2019-09-05 548 1 126 journal article 25589 10.5852/ejt.2019.548 bdc12bce-f24c-4713-8026-a1aee4193ef5 3401901 7BA0D937-437E-4252-8EF4-4F35E6B59445 Mesoconius rufiventris ( Enderlein, 1922 ) comb. nov. Fig. 40F Tanypoda rufiventris Enderlein, 1922: 204 . Aristobata rufiventris – Hennig 1935: 32 . Zelatractodes rufiventris – Steyskal 1968: 20 . Material examined Holotype COLOMBIA • ♀ ; v. Nolcken leg.; MNBG . The collector was presumably J.H. Wilhelm Baron (von) Nolcken, who collected in the mountains of Colombia in 1870–71 . Papavero (1973) provides a summary of Baron von Nolcken’s travels in Colombia , naming several collecting localities of which three are recorded as above 1500 m : Ubaque ( 1950 m ), Cuequeta ( 2200 m ) and Hato ( 1500 m ). Enderlein indicated that the von Nolcken material came from the H. Loew collection. Diagnosis Based on unique female holotype . LENGTH. About 14 mm . COLOUR. Mesothorax and head dark shiny brown, metathorax reddish yellow. Mid and hind femora yellowish, except for pale brown distomedian ring; mid and hind tibiae brown; fore tarsus white, except for tarsomere 1, which is darkened with a dense patch of black ventrobasal setulae. Abdomen yellowishbrown, except for dark oviscape tip. HEAD. Outer vertical bristle absent, inner vertical bristle strong, postocellar bristles parallel and very close together; fronto-orbital bristles not visible on type . Frontal vitta strongly convex, prominent and cone-like, velvety in contrast to shiny epicephalon and delineated by a silvery margin. THORAX. Hind femur slightly swollen and setulose on distal half. Wing mostly clear on basal half and otherwise very lightly infuscated, with a circular clear patch just distal to indistinct, but broad discal band. ABDOMEN. Abdominal segment 1 petiolate. Remarks The prominent frontal vitta, contrastingly coloured anterior and posterior halves of the body, basal vestiture of the fore tarsus and mostly clear wings combine to render this a recognizable species, although it is only known from the holotype female.