Parides phaleucas is a species of butterfly in the family Papilionidae.

The body is very hairy and the white band, which traverses both wings, is intersected by black veins.

"A white band from costal margin of forewing to anal angle of hindwing, parallel to distal margin of forewing, shaded with black scaling on forewing and distally on hindwing, interrupted by the black veins; the band close to cell on both wings, wider in female than in male; female with white spot in cell of forewing; a row of red submarginal spots on hind wing, densely shaded with black on upperside, especially in male".

The larva feeds on Aristolochia weberbaueri Parides phalaecus is a member of the ascanius species group[3] ("Fringe-spots white.

A quadrate whitish spot in space 2 of the forewings is quite peculiar of the ascanius group.