Key to the species of Neopseustis from China

1 Wing expanse exceeding 25 mm (Davis, 1975: 18) .............................................................................. N. archiphenax

- Wing expanse less than 25 mm ..................................................................................................................................... 2

2 Hindwings uniformly fuscous; Apex of valvae with slender uncinate process (Figs. 3, 4, 11). N. moxiensis sp. nov.

- Hindwings with conspicuous whitish scaling on distal half to distal 1/3; Apex of valvae short, acute, without unci- nate process ................................................................................................................................................................... 3

3 Paramere rather elongated, densely covered heavily with scales on one side .............................................................. 4

- Paramere undeveloped, inconspicuous ........................................................................................................................ 5

4 Lateroposterior process of anellus deeply forked basally, forming two slender branches (Figs. 12, 16).... N. meyricki

- Lateroposterior process of anellus forked, one branch sharp and another irregularly serrate (Fig. 15) ...... N. sinensis

5 Lateroposterior process of anellus short horn-shaped, heavily sclerotized, curved inward (Fig. 14) ....... N. bicornuta

- Lateroposterior process of anellus rather long, extending beyond uncus (Fig. 13)............................. N. fanjingshana