Tario was born Francisco Peláez Vega on December 2, 1911, in Mexico City, the son of immigrants from Asturias.

Besides being a writer, Tario had multiple interests throughout his life: he was a football goalkeeper for the Mexican team Asturias F.C., amateur astronomer, and pianist.

His themes encompass man's sensory limitations in perceiving the vastness of the world around him, but without losing sight of the sense of humour, the appearance of the unusual, the extravagant and the grotesque, which distance him from the traditionalism of other authors, which is why he is considered a precursor of Mexican fantastic narrative in the 1950s.

[3] Tario also published the novel Aquí abajo (1943; English: "Down Here"), the short story collections Tapioca Inn (1952) and Una violeta de más (1968), among others.

In 2011 his son Julio, with the help of the Instituto Nacional de Bellas Artes, distributed free of charge Dos guantes negros (English: "Two Black Gloves"), a booklet containing a poem and two stories dedicated to his sons Sergio and Julio; the texts were found in a baroque and colonial-style chest of drawers belonging to Tario, where he kept some photographic albums, newspaper clippings, recordings and from where the play El caballo asesinado and the novel Jardín secreto were also found.