1911 Encyclopædia Britannica/Alcmene
ALCMENE, in ancient Greek mythology, the daughter of Electryon, king of Mycenae, and wife of Amphitryon. She was the mother of Heracles by Zeus, who assumed the likeness of her husband during his absence, and of Iphicles by Amphitryon. She was regarded as the ancestress of the Heracleidae, and worshipped at Thebes and Athens.
See Winter, Alkmene und Amphitryon (1876).