"The Furies, in Greek Erinyes, or euphemistically Eumenides, were
avenging spirits of retributive justice. Their names, when in
course of time their number had come to be fixed as three, were
Alecto, Megaera, and Tisiphone. Their task was to punish crimes not
within the reach of human justice.
Through Aeschylus the tradition developed that after the time when
they had intervened in the case of Orestes, their functions no
longer covered cases of "guiltiness" free from moral guilt. In
spite of their inexorable sternness, they wept when they heard
Orpheus implore the deities of the underworld to restore Eurydice
to life."
- from Bulfinch's Mythology
The Erinyes were called Furiae in Roman mythology.