The Rocky Mountain Parnassian or Mountain Parnassian (Parnassius smintheus) is a high-altitude butterfly which is found in the United States and Canada. It is a member of the Snow Apollo genus Parnassius of the Swallowtail (Papilionidae) family. This mostly white butterfly has red spots in the centers of the hindwing that distinguish it from other Parnassians. They also have dark spots on the forewing and dark wing margins and submargins. Although this butterfly is in the swallowtail family it has no tail