Key D: Species of the Sphex satanas group

1. Female: scutellum and metanotum completely black (Figs 113–114). Male: cellular wing area at least partially fuscous; narrow placoids on proximal halves of flagellomeres IV–VI; free clypeal margin medially with folding (compare Fig. 28)..............................................................................2

– Female: scutellum at least on posterior half and metanotum ferruginous (Figs 109–110, 116). Male: cellular wing area hyaline; placoids broader and covering entire length of flagellomeres III–VI or free clypeal margin without folding...............................................................................3

2. Female: propodeal setae silvery (Fig. 113) ........................................ S. satanas satanas Kohl, 1898

– Female: propodeal setae black (Fig. 114) ........................................ S. satanas memnon subsp. nov.

3. Female: anterior half of scutellum black (Fig. 116). Male: at least femora bright ferruginous (Fig. 117). Socotra ........................................................................................ S. socotrensis sp. nov.

– Female: scutellum entirely ferruginous (Figs 109–110). Male: legs completely black (Fig. 111). Mainland Africa.................................................................................................................................4

4. Female: upper half of clypeus as well as complete scutum black (Fig. 109). Male: free clypeal margin without folding; narrow placoids on proximal halves of flagellomeres IV–VI .................. .................................................................................................................... S. pseudosatanas sp. nov.

– Female: all of clypeus and anterior half of scutum ferruginous (Fig. 110). Male: free clypeal margin medially with folding (compare Fig. 28); broad placoids covering entire length of flagellomeres III–VI .................................................................................... S. rufoclypeatus sp. nov.