We saw about 50 Parnassius smintheus (Rocky Mountain Parnassian), and I'm posting here five photos showing some variation among them. All had black and white antennae, so not P. Clodius. Some have a fuzzy thorax; some have smooth black thorax; some seem to have the red spots on the underside; and some have very transparent wings. They nectar on a variety of flowers; here Siberian Miner's Lettuce.