The Fly is a character that was developed by Joe Simon and Jack Kirby for Harvey if I recall correctly. The Jaguar was also a Harvey imprint. The Fly could fly and had a Buzz Gun that stunned his enemys. The Jaguar could fly by the benefit of a pair of small rockets attached to his belt. Like alot of secondary press comics these two books suffered from low circulation and non mainstream characters so they didn't last as long as some others.

About the same time that Jack Kirby and Joe Simon did the Fly for Harvey, Marvel Comics hired Jack and an add agency for Nelson Rockefeller hired Joe. Jack went on to be the prime aristic developer for Marvel comics during their heyday and produced such characters as The Fantastic Four, The Hulk, Sargent Fury, Dare Devil, IronMan(With Don Heck), Spiderman (with Steve Ditko), THor, Captain America (With Joe Simon), The X-Men and countless others in the form of Villians and minor heros. Jack died about 10 years ago, from congestive heart failure shortly after the 1000 Oaks earthquake.

Joe is still alive today and still active in comics, mainly licensing his creation, well into his 80's.

Don