Lemures
The lemures were shades or spirits of the restless or malignant dead in Roman religion, sometimes used interchangeably with the term larvae (from Latin larva, 'mask'). The term lemures was first used by the Augustan poet Horace (in Epistles 2.2.209), and was the more common literary term during the Augustan era, with larvae being used only once by Horace.