Pale Swallowtail - Papilio eurymedon
A Pale Swallowtail posing streamside on a trail in Big Tujunga Canyon, San Gabriels. May 16, 2006. This is all I ask of our butterflies: be fresh and stay still.
Pale Swallowtail - Papilio eurymedon
This Pale Swallowtail was also near a stream, but in the Santa Rosas above Palm Desert. May 14, 2006. The left wing was a bit malformed.
Pale Swallowtail - Papilio eurymedon
Close-up of the same Pale Swallowtail above.
egg of a Pale Swallowtail butterfly - Papilio eurymedon
I found this eurymedon egg on host Prunus ilicifolia on Cactus Spring Trail on June 12, 2020.
third instar caterpillar of a Pale Swallowtail butterfly - Papilio eurymedon
The day after finding the egg above, I found a third instar larva on Prunus ilicifolia off Santa Rosa Truck Trail. June 13, 2020.
fourth instar caterpillar of a Pale Swallowtail butterfly - Papilio eurymedon
Same as above, but looking like it's ready to molt from the fourth to the fifth instar. July 2, 2020.
Original description of Papilio eurymedon
Pierre-Hippolyte Lucas is credited with describing this butterfly. He published this description in the Revue et Magazin de Zoologie Pure et Appliquée in (1852). As with P. rutulus and several other California butterflies, Lucas learned of this new swallowtail in a lecture by Boisduval on butterflies collected by Pierre Lorquin outside San Franciso. Lucas then published this description before Boisduval's was printed, and thus his name is forever associated with this butterfly.

©Dennis Walker