Herse (Ancient Greek: Ἕρση "dew") was a figure in Greek mythology, daughter of Cecrops, sister to Aglauros and Pandrosos.Cephalus is the son of Hermes and Herse who suffers a tragic ending to his happy marriage with Procris.
According to the Bibliotheca, when Hephaestus unsuccessfully attempted to rape Athena, she wiped his semen off her leg with wool and threw it on the ground, impregnating Gaia. Athena wished to make the resulting infant Erichthonius immortal and to raise it, so she gave it to three sisters, Herse, Aglauros and Pandrosos, in a willow basket and warned them to never open it. Aglauros and Herse disobeyed her and opened the basket which contained the infant and future king, Erichthonius, who was somehow mixed or intertwined with a snake. The sight caused Herse and Aglauros to go insane and they jumped to their deaths off the Acropolis. Shrines were constructed for Herse and Aglauros on the Acropolis.
An alternative version of the story is that, while Athena was gone bringing a limestone mountain from the Pallene peninsula to use in the Acropolis, the sisters, minus Pandrosos again, opened the box with Erichthonius inside. A crow witnessed the opening and flew away to tell Athena, who fell into a rage and dropped the mountain (now Mt. Lykabettos). Once again, Herse and Aglauros went insane and threw themselves to their deaths off the cliffs of the Acropolis. This story supposedly inspired an ancient ritual in Athens: "The Festival of the Dew Carriers" or Arrhephoria.