All the types of dramatic poetry known in Greece, tragic, satyric, and comic, originated in the worship of Dionysus, the deity of wild vegetation, fruits, and especially the vine. In his honour, at the opening of spring, were performed dithyrambs, hymns rendered by a chorus, who, dressed like satyrs, the legendary followers of Dionysus, presented by song and mimic dance stories from the adventurous life of the god while on earth. It is from these dithyrambs that tragedy and satyric drama both sprang. The celebrated Arion, who raised the dithyramb to a splendid art-form, did much[1] incidentally to aid this development. His main achievement in this regard is the insertion of spoken lines in the course of the lyrical performance; it seems, further, that these verses consisted of a dialogue between the chorus and the chorus-leader, who mounted upon the sacrificial table. Such interludes, no doubt, referred to incidents in the sacred story, and the early name for an actor (ὑποκριτής, “one who answers”) suggests that members of the chorus asked their leader to explain features in the ritual or the narrative. At this point drama begins to diverge from the dithyramb. With comedy we are not here concerned.[2] The drama of the spring festival may be called “tragedy,” but it was in a quite rudimentary state. Its lyrics, sung by fifty “satyrs,” would altogether outshine in importance the dialogue-interludes between chorus-leader and individual singers; the theme, moreover, would be always some event connected with Dionysus. Two great changes were necessary before drama could enter on free development: the use of impersonation in the interludes and the admission of any subject at will of the poet. The first was introduced by Thespis, who is said to have “invented one actor”. The second was perhaps later, but at least as early as Phrynichus we find plays on subjects taken from other than Dionysiac legends. It is said that the audience complained of this innovation: “What has this to do with Dionysus?”[3] Another great development is attributed to Pratinas—the invention of satyric drama. The more stately, graver features and the frolicsome, often gross, elements being separated, the way was clear for the free development of tragedy and satyric into the forms we know. But satyric work, though always showing playful characteristics and a touch of obscenity, was never confounded with comedy. Stately figures of legend or theology regularly appeared in it—Odysseus in the _Cyclops_, Apollo in the _Ichneutæ_—and it was a regular feature at the presentations of tragedy; each tragic poet competed with three tragedies followed by one satyric play. When the latter form changed its tone slightly, as in the work of the Alexandrian Pleiad,[4] it approximated not to comedy but to satire.[5]