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

The larva feeds on Aristolochia species including A. rumicifolia, A. cynanchifolia (P. t. tros), A. triangularis (P. t. danunciae).

Forewing in the male with a green spot before the hindmargin; the red area of the hindwing not opalescent.

— An exclusively Brazilian species, which hitherto is only known from the province of Rio de Janeiro.

[2] A full description is provided by Rothschild, W. and Jordan, K. (1906)[3] as dardanus Fabr.