Eupterote diffusa is a moth in the family Eupterotidae. It was described by Francis Walker in 1865. It is found in India and Sri Lanka.
The wingspan is 58–66 mm. Adults are similar to Eupterote mollifera. The wings vary in colour from greyish white to dull ochreous brown or pale primrose yellow. The postmedial line is single, curved on both wings and much nearer to the margin than in E. mollifera. The waved lines are fairly distinct or obsolescent, as are the spots and outer waved line.[1]
. George Hampson . The Fauna of British India, Including Ceylon and Burma: Moths Volume I . Taylor and Francis . 1892 . Biodiversity Heritage Library.