Live and Let Thri
He kept one hand on the pore while his other dipped down to her cerci, the small feeler-like protrusions on the now-inverted upper tip of her abdomen.
A Monstrous Party
Finally, a pair of bladed cerci bust forth from just above her ass, and her changes into the bladed centipede beast were complete.
Bug Thugs
An almost identical yet biologically distinct pair of cerci burst from his former backside, making it hard for an observer to tell what end of him was what.