Diagnostic characters for Xanthopygus A pronotal hypomeron of Xanthopygus skalitzkyi (Bernhauer) B pronotal hypomeron of Xanthopygus xanthopygus (Nordmann) C mesoscutellum of Xanthopygus cognatus Sharp D mesoscutellum of Xanthopygus mirabilis (Erichson) E mesoventrite of Xanthopygus mirabilis (Erichson), arrow points to intercoxal process F mesoventrite of Xanthopygus xanthopygus (Nordmann), arrow points to intercoxal process. Not to scale.