Lyssa

the personification of rage, particularly martial rage, fury, raging madness, frenzy, and, in animals, the madness of rabies.

From Prolegomena to the Study of Greek Religion Jane Ellen Harrison. Chapter VIII

The 'ox-feller' of Homer is probably a double axe, not a goad. It is the typical weapon of the Thracian, and with it the Thracian women regularly on vases slay Orpheus. Through the air down upon Lycurgus swoops a winged demon of madness, probably Lyssa herself, and smites at the king with her pointed goad. To the left, behind a hill, a Maenad smites her timbrel in token of the presence of the god. On the reverse of the vase we have the peace of Dionysos who made all this madness. The god has sent his angel against Lycurgus, but no turmoil troubles him or his. About him his thiasos of Maenads and Satyrs seem to watch the scene, alert and interested but in perfect quiet.

From Heracles By Euripides. Translated by E. P. Coleridge

Madness:

Of noble parents was I born, the daughter of Night, sprung from the blood of Uranus; and these prerogatives I hold, not to use them in anger against friends, nor have I any joy in visiting the homes of men; and fain would I counsel Hera, before I see her err, and thee too, if ye will hearken to my words. This man, against whose house thou art sending me, has made himself a name alike in heaven and earth; for, after taming pathless wilds and raging sea, he by his single might raised up again the honours of the gods when sinking before man's impiety; wherefore I counsel thee, do not wish him dire mishaps.