It is a voracious little mutant beetle that is used by Cort Strasser used to aid in his ‘tender’ questioning.
Physically, the beetle resembles a cross between a borer beetle and a termite. It was shiny black, and had four horned antennae, and six legs. Its labrum flap barely covers the insect's mouth, hardly concealing mandibles that seem totally out of proportion to its size, huge sickle shaped tusks, almost like horns. The little mutant beetle is a carnivore, preferring to feast on meat. Strasser used the little beetle to kill someone who ‘displeased’ him. He had the man swallow it, and the mutant ate its way right out of the mans stomach. (Pilgrimage to Hell)