A new stiletto fly genus from South America (Diptera: Therevidae: Agapophytinae) Author Irwin, Michael E. Author Winterton, Shaun L. text Zootaxa 2020 2020-03-17 4751 2 276 290 journal article 10.11646/zootaxa.4751.2.4 e3adbec8-2861-49f8-b7a2-39f1bdcbb493 1175-5326 3713094 31F0F048-6F6E-416B-B687-4160348D6705 Key to South American genera of Agapophytinae 1 . Antennal scape and pedicel combined length greater than flagellum length, scape narrow cylindrical (Figs 2, 6); palpus noticeably incrassate and of uniform width along length; lower frons and face distinctly rounded; body coloration generally dark with uniformly dark infuscate wings (e.g., Figs 4, 9)............................................... Sigalopella gen. n. – Antennal scape and pedicel combined length less than flagellum length, scape short cylindrical to bulbous; palpus typically slender to apically spatulate; lower frons and face flat or only slightly rounded; body coloration and wing markings variable, rarely uniformly dark (except some Melanothereva ).......................................................... 2 2 . Scutellum with two pairs of macrosetae; scape bulbous incrassate with numerous strong, erect macrosetae; male with single row of postocular setae adjacent to ocellar tubercle dorsally.................................... Pachyrrhiza Philippi – Scutellum with one or two pairs of macrosetae; scape variable, but not bulbous incrassate, usually short and cylindrical, macrosetae size and density variable but typically not erect; male with single row of postocular setae adjacent to ocellar tubercle, or occiput with scattered macrosetae across entire occiput....................................................... 3 3 . Body yellow-orange to grey pubescent; wing hyaline to pale infuscate.............................. Entesia Oldroyd – Body blackish, sometimes with greyish pubescence on scutum; wing mostly dark infuscate....... Melanothereva Malloch