Frontal view of clypeus in different species. A–D color of erect setae on clypeus largely matching color of appressed setae. A Sphex gracilis, ♂, free clypeal margin simple B Sphex argentatus, ♂, free clypeal margin with single lobe C Sphex brevipetiolus, ♀, free clypeal margin shaped indistinctly D Sphex cognatus, ♂, free clypeal margin with two lobes E Sphex mimulus, ♀, erect setae on clypeus black.

  Part of: Dörfel TH, Ohl M (2015) A revision of the Australian digger wasps in the genus Sphex (Hymenoptera, Sphecidae). ZooKeys 521: 1-104.