Orphanostigma angustale is a moth in the family Crambidae.

This species was described by Arthur Gardiner Butler as follows: Expanse 2⁄3 inch.

Head, thorax, and abdomen yellow, with some purplish grey suffusion, chiefly on collar and metathorax.

Forewing purplish grey, a large yellow kidney-shaped spot in and below the cell; a still larger one beyond the cell; some yellow markings on inner margin and at outer angle; cilia yellow, fuscous at apex and middle.

Hindwing yellow; a fuscous line on the discocellulars, another across apex; a fuscous blotch at apex; a spot below first median nervule and another at anal angle.