Key to the West African species of Cylindera (Ifasina)

1 Elytral markings without humeral spot; apical lunule reduced to a spot near the outer apical angle............ ............................................................................................................................................ genofiae Rivalier

- Elytral markings with a humeral spot, apical lunule near the apical margin............................................... 2

2 The transversal middle band slightly directed anteriad; pronotum sub-parallel withdrawn at the anterior angles .................................................................................................................. lutaria (Guérin-Méneville)

- The transversal middle band perpendicular to the suture or slightly directed posteriad; pronotum conformation not as referred above........................................................................................................................ 3

3 Elytral markings with two connected discal anterior dots, apical lunule reaching the suture near the apical tooth; pronotum withdrawn at the anterior and posterior angles, more or less rounded at sides .................. ................................................................................................................................... octoguttata (Fabricius)

- Elytral markings with one discal anterior dot, apical lunule not reaching the suture.................................. 4

4 Elytra domed in the middle region of the second third; proepisterna pilose only at the inner region; mandibles extensively more darkened and metallic ................................................................ decellei Basilewsky

- Elytra not domed; proepisterna pilose at the entire surface; mandibles almost entirely testaceous, darkened at the apex of teeth ................................................................................................. gulbenkiana new species