Papilio aristor, the scarce Haitian swallowtail, is a species of butterfly in the family Papilionidae. It is endemic to Hispaniola (the Dominican Republic and Haiti).
Forewing with two rows of yellow spots; the discal row curved, not extending to the hindmargin, the outer row complete; hindwing with a row of yellow spots. Underside of the forewing with a yellow spot in the cell.
P. aristor Godt. (8d). From Haiti; the only known specimen (Godart's name-type, which was in the Paris Museum, seems to have been destroyed) is in the large collection of Mons. Charles Oberthur; found near Port au Prince. Forewing with two rows of yellow spots; the discal row curved, not extending to the hindmargin, the outer row complete; hindwing with a row of yellow spots. Underside of the forewing with a yellow spot in the cell.Karl Jordan.
It is known to inhabit xeric areas of lowland country in the Dominican Republic, and probably in Haiti also. as a member of the thoas species-group P. aristor is likely to feed on Rutaceae, Piperaceae or Umbelliferae.Adult are known to be on the wing in July.
Papilio aristor is a member of the Papilio thoas species group.