1	Hind femur with marking	2
–	Hind femur without marking	8
2	Hindwing white	3
–	Hindwing black or dark	7
3	Antenna with apical 2 or 3 segments white	X. apicicornis
–	Antenna with apical 2 or 3 segments black	4
4	Forewing with marking	5
–	Forewing without marking	X. leshanensis
5	Hind femur with pair of longitudinal spots	6
–	Hind femur with four spots	X. riparia
6	Pronotum with two yellow spots near anterior margin	X. fujianensis
–	Pronotum without spots near anterior margin	X. xishangbanna sp. nov.
7	Hind femur with a yellowish-white sub-ovate spot	X. shandongensis
–	Hind femur with a white triangular spot	X. nitobei
8	Forewing with marking	9
–	Forewing without marking	10
9	Compound eye with narrow band along inner margin	X. sichuanensis
–	Compound eye without narrow band along inner margin	X. yunnanensis sp. nov.
10	Hindwing black	X. japonica
–	Hindwing pale yellowish-brown	X. manchurei