Iolaus bilineata is a butterfly in the Lycaenidae family. It is found in the Democratic Republic of Congo.
In Greek mythology, Iolaus (Greek: Ἰόλαος Iólaos) was a Theban divine hero, son of Iphicles and Automedusa.
He was famed for being Heracles's nephew and for helping with some of his Labors, and also for being one of the Argonauts. Through his daughter Leipephilene, he was considered to have fathered the mythic and historic line of the kings of Corinth, ending with Telestes.
A genus of Lycaenid butterfly has been named after him.
As a son of Iphicles, Iolaus was a nephew of Heracles. He often acted as Heracles' charioteer and companion. He was popularly regarded as Heracles's lover, and the shrine to him in Thebes was a place where male couples worshiped and made vows.
The Theban gymnasium was also named after him, and the Iolaia or Iolaea (Greek: Ιολάεια), an athletic festival consisting of gymnastic and equestrian events, was held yearly in Thebes in his honor. The victors at the Iolaea were crowned with garlands of myrtle.
Iolaus provided essential help to Heracles in his battle against the Hydra, his second labor. Seeing that Heracles was being overwhelmed by the multi-headed monster (the Lernaean Hydra), who grew two heads in place of each one cut off, Iolaus sprang to help, cauterizing each neck as Heracles beheaded it.
Iolaus is a genus of butterfly in the family Lycaenidae. The genera Argiolaus, Epamera, Iolaphilus and Stugeta are often included in Iolaus. Iolaus species are found in the Afrotropic ecozone.