the indicater or denouncer, is a translation of Μηνυτής, a surname of Heracles. Once, the story runs, a golden vessel had been stolen from the temple of Heracles at Athens. Heracles repeatedly appeared to Sophocles in a dream, until the latter informed the Areiopagus of it, and the thief was arrested, and confessed his crime. From this circumstance the temple was afterwards called the temple of Heracles Menytes, or Index. (Cic. de Div. 1.25; Hesych. s. v. μηνυτής; Σοφοκλέους γένος καὶ βίος.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890