"from the dimpled cheeks of the august Tysiphone "

Tisiphone was one of the Erinyes in Greek mythology.  These are deities of vengeance, and correspond with the Furies of Roman mythology.  Virgil identifies three sisters - Alecto (unnameable), Megaera (grudging), and Tisiphone (vengeful destruction).  Their heads are wreathed with serpents, and their eyes drip with blood.  Some depictions show them with the wings of a bat and the body of a dog.  Tisiphone is responsible for punishing crimes of murder - parricide, fratricide and homicide.