Wife of King Proetus of Tiryns. Stheneboea falsely accused Bellerophon of being in love with her, which caused Proetus to dispatch the hero to the king of Lycia with a sealed request that he be put to death. Iobates, the king in question, thought to accomplish this by sending Bellerophon after the Chimaera. But Bellerophon killed the monster instead.

Bellerophon slays the Chimaera. (zoom)