In demonology, Stolas is a Great Prince of Hell.
Also known as Stolos and Solas.
Stolas is a Great Prince of Hell commanding twenty-six legions of demons (twenty-five to other authors).
Stolas is depicted as a crowned owl with long legs, a raven, or a man.
Stolas teaches astronomy and the knowledge of poisonous plants, herbs and precious stones.
Stolas is a great prince, appearing in the forme of a nightraven, before the exorcist, he taketh the image and shape of a man, and teacheth astronomie, absolutelie understanding the vertues of herbes and pretious stones; there are under him twentie six legions. Pseudomonarchia daemonum - Johann Wier (1583)
The Thirty-sixth Spirit is Stolas, or Stolos. He is a Great and Powerful Prince, appearing in the Shape of a Mighty Raven at first before the Exorcist; but after he taketh the image of a Man. He teacheth the Art of Astronomy, and the Virtues of Herbs and Precious Stones. He governeth 26 Legions of Spirits; and his Seal is this, which is, etc. Goetia - S. L. MacGregor Mathers (1904)