FIGURES 9–12 in Sinolethrus, a new subgenus of the genus Lethrus Scopoli, 1777 from China (Coleoptera: Geotrupidae: Lethrinae) and new synonymy of the subgenus Paralethrus Nikolajev, 2003

FIGURES 9–12. Head of Lethrus species with mandibular appendix, keels and hornlike apophyses of mandibles (males), schematically. 9–10 L. (Ceratodirus) karelini Gebler, 1845 (9 frontal view, 10 lateral view); 11–12 L. (Ceratodirus) cephalotes Pallas, 1771 (11 frontal view, 12 lateral view).