The size of the cavity is not important. Transpiration increases if the elytra are removed, emphasizing the importance of the epicuticle and subelytral cavity. "Pimelia" have tubercles on the surface of their elytra which scatter and reflect incident energy. Burrowing is probably the most important behavior modification for heat regulation in "Pimelia", because it permits access to a broad range of ambient temperatures. "Pimelia" are diurnal, emerging in early morning and late evening but remaining under the sand during the hot hours of the day.