One of the cells was revealed to have at least 20 "Leucospis" pupal exuviae. The first notable development is the exuviae, a protective pupal skin. The old exoskeleton is called an exuviae. The shed portions are called the exuviae. Some are complete but are most probably exuviae as well. In Latin it was "Leonis exuviae super asinum". The adults emerge from the exuviae ready to mate. The exuviae or abandoned exoskeletons remain, still clinging to the bark of the tree. Some shields, such as that of "Cassida stigmatica", are entirely frass-free, made only of exuviae. The remnants of the old, empty exoskeleton are called exuviae.