The titles of his other known plays ("Actaeon", "Alcestis", "Antaeus", "Daughters of Danaus", "Egyptians", "Pleuroniai", and "Tantalus") show that he dealt with mythological as well as contemporary subjects. He introduced a separate actor, as distinct from the leader of the chorus, and thus laid the foundation for theatrical dialogue. But in his plays, as in the early tragedies generally, the dramatic element was subordinate to the lyric element as represented by the chorus and the dance. According to the "Suda", Phrynichus first introduced female characters on the stage (played by men in masks), and made special use of the trochaic tetrameter.