ɪn æt lˈiːst sˌʌm spˈiːsiːz, ðə pjˈuːpə dɪvˈɛləps ɪn ɐ sˌʌbtɪɹˈeɪniən sˈɛl wɪð ɐ θˈɪn wˈɔːl mˌeɪd ʌv fˈiːsᵻz mˈɪkst wɪð sˈɔɪl.
In at least some species, the pupa develops in a subterranean cell with a thin wall made of feces mixed with soil.