Key H: Species of the Sphex meridionalis group

1. Female: scutellum ferruginous (Fig. 127). Male: at least flagellomeres I–IV ferruginous (Fig. 128) .......................................................................................................................... S. occidentalis sp. nov.

– Female: scutellum black (Figs 124–125). Male: at most part of flagellomere I ferruginous, remaining flagellomeres black (Fig. 126)...........................................................................................................2

2. Southern-central Africa. Female: appressed paraocular setae rich golden (Fig. 36) ...................... ........................................................................................................... S. meridionalis (Arnold, 1947)

– Eastern Africa. Female: appressed paraocular setae pale silvery-golden (Fig. 37) ........................ .............................................................................................................................. S. nefrens sp. nov.