Psellus' classification of demons

This is a classification of demons prepared by Michael Psellus in the 11th century and that undoubtedly was an inspiration for the one Francesco Maria Guazzo prepared later.

• Demons of air, which cause atmospheric phenomena
• Demons of earth that try to tempt people
• Demons of water that destroy aquatic life, and cause wrecks and death of people in the sea
• Demons of the underground, which cause earthquakes and volcanic eruptions
• Demons of night, which avoid daylight and are invisible to people
• Demons of fire, which dwell far from us.