Diathrausta picata is a moth in the family Crambidae. It was described by Arthur Gardiner Butler in 1889.[1] It is found in the north-western Himalayas[2] and Australia.
The wingspan is about 17 mm. The wings are grey, with small blackish dots. The forewings are crossed by a black stripe and there is a small pure white spot in the cell, followed by a blackish marking. There is a white band, broken in two and bounded by a white-edged undulated discal black line. The hindwings have a marking at the end of the cell, connected by a black line. There is a short irregular white band from the costa.[3]