King Tegyrius. Later on, Eumolpus was discovered in a plot to overthrow King Tegyrios and was obliged to take flight and fled to Eleusis where he formed a friendship with the Eleusinians.

In Eleusis, Eumolpus became one of the first priests of Demeter and one of the founders of the Eleusinian Mysteries. When Ismarus died, Tegyrios sent for Eumolpus to return to Thrace, they made peace and Eumolpus