Agapophytinae

Irwin, Michael E. & Winterton, Shaun L., 2020, A new stiletto fly genus from South America (Diptera: Therevidae: Agapophytinae), Zootaxa 4751 (2), pp. 276-290 : 277

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