Taractrocera maevius, the common grass dart,[1] is a species of butterfly belonging to the family Hesperiidae.

Forewing with a short streak on the median vein in the middle of the cell, another above it at the upper end, with two short small streaks between it and the costa, sometimes connected together; a series of spots in two parts across the disc, three conjoined from the costa near the apex, and four commencing at the base of the second median interspace, divided from each other by the veins, all the spots somewhat quadrate and excavated on their outward sides, two small quadrate spots nearer the margin in the fifth and sixth interspaces.

Hindwing entirely suffused with white, all the veins pure white.The common grass dart is similar in size and markings to the Tamil grass dart Taractrocera ceramas Hewitson, but the spots on the forewings is white.

It occurs in the monsoon and immediate post-monsoon months when the vegetation is green, but occasional specimens may appear in other seasons as well.

The caterpillars feed on various species of grasses, including rice, Oryza sativa.