Thinking desert marble because of habitat. It was in dry, rocky, mountain brush/PJ habitat with some ponderosa pine.
Baird's Swallowtail ButterflyGrand Canyon Village, GRCA, AZ, May 4, 1948, L. Schallbach
Grand Canyon Museum Collection
2 Albright Ave, Grand Canyon Village, AZ 86023
Phone: (928) 638-7769
https://www.nps.gov/grca/learn/historyculture/muscol.htm
Black Swallowtail Papilio polyxenes
Found after dark on the cement below a street light. Temperatures were warmer today and likely caused this guy to emerge early
Last instar larva on pellitory-of-the-wall.
It is pupa on right.