Lemures

The Lemures were spirits in Roman mythology.

Description
Lemures were spirits of the restless or malignant dead. They represent spirits of those who weren't given a proper burial, funeral rites, or affectionate cult by the living.

Worship
On the dates of May 9, 11, and 13, the head of households would rise at midnight and throw black beans behind them to avert the anger of the Lemures.