Tridrepana trialba is a moth in the Drepanidae family. It was described by Watson in 1957. It is found in Indonesia (Sulawesi).
The wingspan is about 27.6-35 mm for males and 37.6-38.8 mm for females. Adults can be distinguished from related species by a white (not brown) mid-cell spot on the upperside of the forewings.
References
Tridrepana trialba Wikipedia(Text) CC BY-SA