FIGURES 37–42 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 37–42. Head of Lethrus species with mandibular appendix, keels and hornlike apophyses of mandibles (males), schematically. 37–39 L. (Lethrus) fallax Nikolajev, 1975 (37 view frontal, 38 lateral view, 39 dorsal view); 40–42 L. (Paralethrus) crassus Hillert, 2014 (40 frontal view, 41 lateral view, 42 dorsal view, after Hillert 2004).