Chiasmia nora is a moth in the family Geometridae, described by Francis Walker in 1861.
It is found in northern India, Sri Lanka, south-eastern Asia and probably throughout Sundaland.
Very similar to Semiothisa eleonora, differs from black suffusion especially beyond the medial band of both wings.
[2] Larva greenish, with light, dull yellow longitudinal bands.
It was observed to drink the droplets exuded from the anus of a mosquito while it was sucking blood from a water buffalo.