Nyitus

In Catalan legends, a nyitus (in Spanish: "Nitus") is a female mythological being related to the "falgue".

Behaviour of the Nyitus
This supernatural being is shown as a small grain of dust, which is very impossible to describe the trifle; also known for entering a person's ear until reaching the brain. This creature does not kill people, but is also known for eating person's memories, which makes him or her eager to sleep. The reason about this creature is those who have bad memory and a person is asked if he or she has this creature.

Generally, this creature is very notorious as well known in many legends of the nyitus.

The synonyms for the nyitus are: nyitols, nitus, and nytus in Catalonian areas. This creature has a female counterpart known as the "Flague".