Key to incertae sedis species of the genus Nemophora based on external morphology and male genitalia

1 Forewing color uniformly dark brown to black, without other color markings........................ N. bispina sp. nov.

- Forewing with many colors and obvious markings............................................................2

2 Forewing without central fascia, basal 3/4 scattered numerous long variegated stripes, with purple metallic luster... N. raddei

- Forewing with obvious central fasica at middle...............................................................3

3 Forewing ground color metallic green on basal half, with an oblique transverse black line at basal 1/4 and a Y-shaped black marking at half........................................................................... N. chrysocharis

- Forewing ground color not green, without narrow transverse black lines.......................................... 4

4 Forewing ground color metallic golden cupreous, base and half of forewing both with black transverse fasciae with purple luster........................................................................................ N. ahenea

- Forewing ground color dark brown, central fascia of forewing white; hindwing also white................... N. chionella