Key to the species of Chinese Ephysteris based on external characters

1 Forewing length 6–8 mm, pale grey or yellowish grey, termen distinctly mottled grey ... E. (M.) insulella

- Forewing length 4–6 mm .............................................................................................................................2

2 Forewing uniformly dark, blackish ................................................................................... E. (E.) promptella

- Forewing lighter, pale-grey mottled ochreous along veins or uniformly yellowish or pale-brown............3

3 Forewing pale-grey mottled ochreous along veins......................................................................................4

- Forewing pale-yellow without marking or pale brown with distinct dark spots.........................................5

4 Forewing length 5–6 mm, ground colour pale-grey ........................................................... E. (M.) subovata

- Forewing length 4–5 mm, ground colour yellowish-brown ................................. E. (M). montana sp. nov.

5 Forewing pale-yellow, mottled grey apically and along costa ............................................... E. (M.) flavida

- Forewing darker, pale-brown, with three distinct black spots ............................ E. (M.) wenquana sp. nov.