Lystrophis is the genus of tricolored South American hognose snakes.

They mimic milk snakes or coral snakes with their red, black, and white ringed patterns.

The genus Lystrophis contains five species that are recognized as being valid.

[2] Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Lystrophis.

All species of Lystrophis are sometimes included in the genus Xenodon.