Key to species of the genus Statherotis in Thailand (based on adult male)

1. Forewing with an elongate patch on costa (Fig. 5)...................................... olenarcha (Meyrick, 1931)

- Forewing with a subtriangular patch on costa............................................................... 2

2. Upperside of hindwing medially with a patch of black modified scales (Fig. 3)...... S. discana (Felder & Rogenhofer, 1875)

- Upperside of hindwing medially without patch of black modified scale patch...................................... 3

3. Hindwing with a large, rounded anal lobe (Fig. 6)............................... S. maungmaithongi Pinkaew sp. nov.

- Hindwing without large, rounded anal lobe................................................................. 4

4. Hindwing subrectangular (Fig. 1), abdominal segments 6–8 with modified scales (Fig. 24)...... S. amaeboea (Lower, 1896)

- Hindwing subtriangular (Fig. 4), only abdominal segment 8 with a band of scale sockets at apices of posterolateral rounded lobe (Fig. 26)...................................................................... S. leucaspis (Meyrick, 1902)