cremaster: a stout spine, process or hooked area at the hind end of pupae in Lepidoptera.
Crotchets: the curved spines or hooks on the prolegs of caterpillars and on the cremaster of pupae.
The cremaster is a characteristic structure in the pupa of a moth or butterfly.
The pupa is fastened to this pad by a spiny hook or process, the cremaster (fig. 23 cr), on the last abdominal segment.
This hook-like projection is called the cremaster, and it serves a very important purpose in holding the chrysalis in position.
The cremaster, which is short, is bent upward at an oblique angle with the line of the ventral surface.