Here the present dramatic action begins; and is in form a Tetralogy, that is to say, a cycle of four members, comprising a trilogy, or sequence of three tragedies followed by a satyric play, connected in subject-matter. The first Play of the series opens with Myrtilus craving reward, which Hippodamia refuses; denouncing him to Pelops as insulting her; while Myrtilus denounces her, as her father's murderer. Pelops kills Myrtilus and puts away Hippodamia and her children, Atreus and Thyestes, as tainted with parricide, leading home as his bride the Nymph Danai's.