Ascalaphus (son of Acheron)

According to the mythic summaries preserved in the cited sources, Ascalaphus is the son of the stygian river-god Acheron and the nymph Orphne. He is presented as custodian of Hades' orchard and appears in the narrative of Persephone's abduction: after Persephone eats pomegranate seeds in the Underworld, Ascalaphus tells the other gods that she has eaten underworld food, which (by the rule recorded in the myth) obliges her to spend part of each year in the Underworld. Subsequent narrative episodes relate that Demeter punished Ascalaphus by burying him beneath a heavy rock; when Heracles later moved the stone, later accounts report Ascalaphus was transformed into an owl (variants attribute the metamorphosis to Demeter or to Persephone, who sprinkles him with water of the river Phlegethon).

Sources treat Ascalaphus initially as an anthropic mythic figure (son of a river-god and a nymph, an attendant in Hades). After his punishment he is said to have been transformed into an eagle owl. Ovid describes the transformed form in condemnatory terms—"the vilest bird; a messenger of grief; the lazy owl; sad omen to mankind"—and later tradition identifies the owl as a familiar or emblematic bird associated with Hades.

The primary function attributed to Ascalaphus in the sources is accusatory/reporting: he reports that Persephone ate pomegranate seeds in the Underworld, thereby invoking the binding rule that causes her seasonal return to Hades. Beyond this narrative role and his metamorphosis into an owl (an omen associated with the chthonic realm), the cited sources do not ascribe further supernatural powers, active magical abilities, or broad agency beyond serving as an underworld attendant and emblematic omen-bearer.