or AMPSANCTI LACUS, a cave or lake in the heart of the Hirpini, or Principa to Ultra, near the city Tricento, (Cicero, Virgil, Pliny;) it is now called Mephisto, from Mephisto, the god of flench, who had a temple there. The ancient poets imagined that this gulf led to hell. It is also called Anfanti.