Goetia – S. L. MacGregor Mathers (1904) (quoted)
The Sixty-fourth Spirit is Haures, or Hauras, or Havres, or Flauros. He is a Great Duke, and appeareth at first like a Leopard, Mighty, Terrible, and Strong, but after a while, at the Command of the Exorcist, he putteth on Human. Shape with Eyes Flaming and Fiery, and a most Terrible Countenance. He giveth True Answers of all things, Present, Past, and to Come. But if he be not commanded into a Triangle, he will Lie in all these Things, and deceive and beguile the Exorcist in these things, or in such and such business. He will, lastly, talk of the Creation of the World, and of Divinity, and of how he and other Spirits fell. He destroyeth and burneth up those who be the Enemies of the Exorcist should he so desire it; also he will not suffer him to be tempted by any other Spirit or otherwise. He governeth 36 Legions of Spirits, and his Seal is this, to be worn as a Lamen, etc.
Pseudomonarchia daemonum – Johann Wier (1583) (quoted)
Flauros a strong duke, is seene in the forme of a terrible strong leopard, in humane shape, he sheweth a terrible countenance, and fierie eies, he answereth trulie and fullie of things present, past, and to come; if he be in a triangle, he lieth in all things and deceiveth in other things, and beguileth in other busines, he gladlie talketh of the divinitie, and of the creation of the world, and of the fall; he is constrained by divine vertue, and so are all divels or spirits, to burne and destroie all the conjurors adversaries. And if he be commanded, he suffereth the conjuror not to be tempted, and he hath twentie legions under him.
Dictionnaire Infernal – Collin de Plancy (1863) (paraphrased)
Grand-general of hell and commanding 20 legions, Flavros appeared as a leopard. In human form, he had a frightful face with burning eyes. He knows of the past/present/future, can turn demons and spirits against the exorcists.