Taxonomic revision of the mydas-fly genera Eremohaplomydas Bequaert, 1959, Haplomydas Bezzi, 1924, and Lachnocorynus Hesse, 1969 (Insecta, Diptera, Mydidae) Author Boschert, Claire Rice University, Houston, TX, USA Author Dikow, Torsten https://orcid.org/0000-0003-4816-2909 Department of Entomology, National Museum of Natural History, Smithsonian Institution, 10 th Street and Constitution Avenue NW, Washington, DC 20560, USA dikowt@si.edu text African Invertebrates 2022 2022-03-25 63 1 19 75 http://dx.doi.org/10.3897/afrinvertebr.63.76309 journal article http://dx.doi.org/10.3897/afrinvertebr.63.76309 2305-2562-1-19 F849C700225A4923AE1962882F933E83 B0655A9F7BBC582691EC0F00E156BA38 Lachnocorynus Hesse, 1969 Lachnocorynus Hesse, 1969: 46 . BIF: https://www.gbif.org/species/1591101 Type-species: Lachnocorynus chobeensis Hesse, 1969 , by original designation. Diagnosis. The genus can be delineated by the densely setose head, the distinctly and deeply rugose scutum, and the costal vein terminating where M1 joins the wing margin. Distribution, biodiversity hotspots, phenology, and biology. Known only from three disjunct localities in northern Namibia, north-eastern Botswana, and north-eastern Zimbabwe (Fig. 56 ). A rarely collected genus known only from four specimens in museum collections, three collecting events between 1930-1986 (Table 1 ), and one observation on iNaturalist in 2019 (https://www.inaturalist.org/observations/26760859). The genus is not known to occur in any biodiversity hotspot. Adult flies are active in mid to late winter (Table 2 ), which corresponds to the dry season and lower temperatures. Nothing is known of the biology.