The introduced tachinid fly poses additional threat to the beautiful caterpillars of this species. Larvae pupate in subterranean chambers a few inches beneath the surface of the ground. The pupa is a shiny, chestnut-brown color.
The introduction of a tachinid fly presents a threat to the visually appealing caterpillars of this species. The larvae create hidden underground structures, which is analogous to their development in subterranean chambers a short distance below the ground's surface.