Protographium philolaus, the dark zebra swallowtail or dark kite-swallowtail, is a butterfly of the family Papilionidae. It is found from southern Texas to northern South America. The wingspan is 90–95 mm. There are broad black bars on the upper surface of the forewings of the males. Females are similar, although some are almost completely black. Both sexes have long tails. Adults feed on flower nectar.