In demonology, Malthus is an Earl of Hell.
Other spellings: Halphas, Malthas, Malthous.
Malthus is an Earl of Hell, commanding 26 legions of demons
Malthus is depicted in the shape of a stork.
Malthus builds towers and fills them with ammunition and weapons, and sends warriors to the place he is requested to. He is said to have a rough voice when speaking.
Halphas is a great earle, and commeth abroad like a storke, with a hoarse voice, he notablie buildeth up townes full of munition and weapons, he sendeth men of warre to places appointed, and hath under him six and twentie legions. Pseudomonarchia daemonum - Johann Wier (1583)
The Thirty-eighth Spirit is Halphas, or Malthous (or Malthas). He is a Great Earl, and appeareth in the Form of a Stock-Dove. He speaketh with a hoarse Voice. His Office is to build up Towers, and to furnish them with Ammunition and Weapons, and to send Men-of-War to places appointed. He ruleth over 26 Legions of Spirits, and his Seal is this, etc. Goetia - S. L. MacGregor Mathers (1904)