Mania: Etruscan infernal deity, one of a dyad including Mantus. She went on into Latin literature, ruling beside Mantus and was reported to be the mother of the Lares and Manes. Under the Etruscan kings, she received the sacrifices of slain children during the Laralia festival of May 1. She continued to survive in post-classical Tuscan folklore as Mania della Notte, a nocturnal spirit bringing nightmares...