Diagnostic characters for Xanthopygus A abdominal sternites 7–8 of Xanthopygus skalitzkyi (Bernhauer) B abdominal sternites 7–8 of Xanthopygus viridipennis Sharp, arrow points to the porose structure C abdominal sternites 5–7 of Xanthopygus giganeus (Bernhauer), arrow points to the anterior transverse lines D abdominal tergites 3–8 of Xanthopygus cognatus Sharp, arrow points to arch-like carina on tergite 3 E lateral view of the aedeagus of Xanthopygus faustus (Erichson), arrow points to the serrated apical carina F lateral view of the aedeagus of Xanthopygus dimidiatus Bernhauer, arrow points to the hook-like carina. Not to scale.