Apis was a king of Argos. He was a son of Phoroneus by the nymph Teledice, and brother of Niobe. During his reign he established a tyrannical government and called the Peloponnesus after his own name Apia: but he was killed in a conspiracy headed by Thelxion, king of Sparta, and Telchis. Argus Panoptes, the descendant of his sister Niobe, avenged his murder by putting Thelxion and Telchis to death. In another tradition, Apis is said to have given up his kingdom to his brother Argus and to have gone to Egypt where he reigned for a number of years. This statement shows that Egyptian myths were mixed up with the story of Apis, see Apis (god).