Key to species of Biflabelotillus Pic, 1949

1. Elytra uniformly coloured (Figs 14, 17, 21, 24) or at most with pale-brown humeral spot (Fig. 28). Pronotum parallel-sided (Figs 7, 8). Space between eyes relatively broad, HW / FW <4................................................. 2

- Elytra bicoloured with anterior half black and posterior half pale brown. (Fig. 34). Sides of pronotum not parallel, widest before middle (Fig. 9). Space between eyes very narrow, HW / FW> 4. Bituberculate foveae lacking in apical third of elytra......................................................................................... B. bicolorus sp. nov.

2. Elytra pale brown, pronotum and head dark brown. Larger species with body length greater than 10 mm. Inner interstriae completely smooth, without any tubercles. Bituberculate foveae lacking in apical fourth of elytra. Space between foveae larger than their diameter.................................................................. B. foveolatus Pic, 1949

- Whole body black. Smaller species with body length less than 8 mm. All interstriae slightly but distinctly ungulated and with tubercles. Bituberculate foveae present on almost whole elytral surface. Space between foveae smaller than their diameter................................................................................. B. peyrierasi Menier, 1979