Diagnostic characters for Xanthopygus A metepimeron (mep) and metepisternum (mes) of Xanthopygus mirabilis (Erichson) B metepimeron (mep) and metepisternum (mes) of Xenopygus analis (Erichson) C metacoxae of Xanthopygus mirabilis (Erichson), arrow points to spines D metacoxae of Triacrus dilatus Nordmann, arrow points to spines E Metatarsus of Xanthopygus xanthopygus (Nordmann) F metatarsus of Xanthopygus flohri Sharp G metafemur of Xanthopygus skalitzkyi (Bernhauer), showing crenulate surface. Not to scale.