A son of the Nemean king Lycurgus, and Eurydice. His real name was Opheltes, which was said to have been changed into Archemorus, that is, "the Forerunner of death," on the following occasion. When the Seven heroes on their expedition against Thebes stopped at Nemea to take in water, the nurse of the child Opheltes, while showing the way to the Seven, left the child alone. In the meantime, the child was killed by a dragon, and buried by the Seven. But as Amphiaraus saw in this accident an omen boding destruction to him and his companions, they called the child Archemorus, and instituted the Nemean games in honour of him. (Apollod. iii. 6. § 4.)