Boreads

[5] They succeeded in driving the monsters away but did not kill them, at a request from the goddess of the rainbow, Iris, who promised that Phineas would not be bothered by the harpies again.

[8] Their death was said to be caused by Heracles on Tenos in revenge for when they convinced the Argonauts to leave him behind as he searched for Hylas in Mysia.

[3]: I, 1296–1314 Other sources imply that the sons of Boreas died chasing the harpies, as it was fated that they would perish if they failed to catch those they pursued.

According to a rare variant of the myth by Tzetzes, the old man Phineus who was blind because of old age had two daughters named Eraseia and Harpyreia.

Ultimately, the sisters abandoned themselves into poverty and fatal famine and were eventually snatched away by Zetes and Calais, disappearing from those places ever since.