Ethmia susa is a moth in the Depressariidae family. It is found in Taiwan. The wingspan is 22–24 mm. The forewings are grey, marked with twelve black spots arranged into four oblique, parallel rows. The hindwings are also grey. Adults are on wing from March to September.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0