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 species of Sigalopella gen. n. 1. Femora black ( Figs 6–8 )............................................................. S. nigrofemoralis sp. n. – Femora yellow (Fig. 1)................................................................................ 2 2. Abdomen orange basally (laterally on segments 1–2 and sometimes segment 3) ( Figs 3 –5)............ S. armeniaca sp. n. – Abdomen uniform black (Figs 1, 12)..................................................................... 3 3. Scape narrow, much longer than head length, most macrosetae filamentous regardless of size; flagellum longer and sub-cylindrical along most of length; face distinctly bulbous and shiny (Figs 9–13)....................... S. rufifemoralis sp. n. – Scape thicker, only slightly longer than head length, larger macrosetae shorter and more robust dorsally and laterally; flagellum shorter and more tapered; face raised but more broadly rounded (Fig. 1–2) (male unknown).......... S. ammophila sp. n.