One of 72 demons of Ars Goetia. Most often depicted as an owl or a raven.

^{"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." - Ars Goetia}