Potanthus serina, the large dart, is a species of butterfly of the family Hesperiidae.

It is found on the Andamans, as well as in southern Burma, Singapore and the Philippines.

The wingspan is about 35 millimetres (1.4 in), making it the largest species in the genus Potanthus.

[2] It was formerly treated as a subspecies of Potanthus hetaerus.

This Hesperiinae-related article is a stub.