1	Dorsal integuments reddish-brown. Frons and vertex distinctly raised (Fig. 3). Median lobe of aedeagus (Fig. 6) short and robust, in ventral view laterally sub-parallel, apically widely rounded; ventral sulcus very wide, clearly impressed; in lateral view basally clearly arcuate at basal third and slightly sinuous in apical part	Jacobyana bezdeki sp. n.
–	Dorsal integuments entirely black or with reddish elytral apex. Frons and vertex flat (Figs 9, 15)	2
2	Dorsal integuments black with clearly reddish elytral apex. Abdominal sternites with uniformly and densely impressed punctures (Fig. 11). Median lobe of aedeagus (Fig. 13) in ventral view clearly lanceolate with acutely rounded apex; in lateral view strongly arcuate at basal third and slightly sinuous in distal half with apex slightly bent ventrally	Jacobyana centrafricana sp. n.
−	Dorsal integuments entirely black (sometimes only with slightly reddish tip of elytra). Distal abdominal sternites medially without punctation (Fig. 18). Median lobe of aedeagus (Fig. 20) in ventral view apically widely sub-truncate, with ventral sulcus very wide with evident longitudinal median carina; median lobe in lateral view very strongly curved at basal third with apex clearly bent ventrally	Jacobyana sudafricana sp. n.