Dictionary.net

Insanity in which the hallucination is the presence of many devils.

Doemonomania, Theomania, Entheamania, from 'demon,' a spirit of good or evil, and 'madness. A variety of madness, in which the person conceives himpossessed of devils, and is in continual dread of malignant spirits, the pains of hell, &c. Also, religious insanity, Sebastomania.

See demonia.