Harley Hudson was driven to become a crime-fighter since he was a young boy. He studied a wide variety of disciplines, eventually becoming an entomologist and chemist. He discovered that insects such as ants have super strength because they are able to coordinate their muscles. After teaching himself the same trick, Harley finds himself able to do astounding things and becomes the hero known as Firefly. His love interest was newspaper reporter Joan Burton. His enemies included Dr. Dread, Sneaky and the Mummy.