The name for the daughters of King Proetus of Tiryns: Iphianassa (1), Iphinoe, and Lysippe. They were struck with madness when they insulted a deity (Hera or Dionysus) and roamed the land, believing they were cows. Melampus was asked to cure them and demanded a third of the realm in exchange, but Proetus refused. After the women had killed their own children, Proetus accepted Melampus' terms which had by now increased. Proetus' daughters were cured, with the exception of Iphinoe who had already died.
- Ovid. Metamorphoses xv, 307-360.