Deltoplastis coercita is a moth in the family Lecithoceridae. It was described by Edward Meyrick in 1923. It is found in southern India.[1]
The wingspan is 12–13 mm. The forewings are violet fuscous, slightly whitish sprinkled, with a broad streak of blackish-fuscous suffusion on the basal fourth of the costa, posteriorly suffused and undefined. There is an irregular-edged triangular blackish-fuscous white-edged patch extending on the dorsum from the base to the middle, the apex reaching two-thirds across the wing near before the middle, the space between this and the costal streak is suffused with whitish. There is a very oblique blackish white-edged strigula on the costa before the middle, the second discal stigma forming a small blackish white-edged spot, sometimes a smaller similar spot beneath it. There is a suffused dark fuscous subterminal fascia of which the discal portion is expanded into a broad blotch reaching the second discal stigma, edged beneath and posteriorly by white scales, a small white mark on the costa preceding this. There is also a blackish terminal line. The hindwings are light grey, thinly scaled and whitish tinged anteriorly.[2]