Roy C. Flickinger, The Greek theater and its drama (1918)
“ The dithyramb and the comus, together with their derivatives, early tragedy and early comedy, were entirely choral. Actors were first developed in tragedy (see pp. 16 and 48, n. 1, above) . Inasmuch as the early dithyramb and early tragedy were devoted to the worship of Dionysus and since their choreutae were his attendant sprites (satyrs or sileni) , it followed that their songs would mostly take the form of prayers addressed to him, hymns in his honor, or odes descriptive of his adventures, sufferings, etc. A lyric duet between the coryphaeus and the other choreutae was also possible. ”
