Key to African Xantholinini genera south of the Sahara lacking dorsal rows of punctures on the prono-

tum (assigned in the past to Thyreocephalus and Eulissus)

1 Superior line of pronotal hypomeron not turning downwards until close to anterior angle and distinctly separated from inferior line (Janák & Bordoni 2014: Figs. 7, 26, 51)................................................. Achmonia Bordoni

- Superior line of pronotal hypomeron turning downwards well before middle, joining or almost joining inferior line next to front margin of procoxae and continuing onto anterior margin of pronotum (Figs. 6, 26)............................. 2

2 Metatibia with apical ctenidium only (Fig. 15). Head with large impression behind the eyes (Figs. 3–5, 7). Lateral part of temple with evident subelliptical groove (Figs. 4, 7)................................................. Afrus gen. nov.

- Metatibia with apical and subapical ctenidium (Figs. 27, 28). Head without large impression behind eyes (Figs. 24, 25). Temple variable, but laterally never with subelliptical groove........................... Thyreocephalus Guérin-Méneville