Jack drew all sorts of wild looking bugs throughout his career. Here is the one with the most self-explanatory name: the Bug. From New Gods # 9 (1972), scanned from the original artwork.
Another one of Jack's more famous bug characters: the Simon/Kirby Fly. This is the cover to Adventures of the Fly #1 (1959). Kirby pencils and inks. Many Kirby scholars believe the combination of the Fly and the bad guy in this image called "Spider Spry" resulted in one of the most famous comic book characters of all time 3 years later in the book Amazing Fantasy # 15 (1962). This is the very first appearance of Spider-Man, the cover was penciled by Jack Kirby and inked by Steve Ditko.
Another one of Jack's more famous bug characters: the Simon/Kirby Fly. This is the cover to Adventures of the Fly #1 (1959). Kirby pencils and inks. Many Kirby scholars believe the combination of the Fly and the bad guy in this image called "Spider Spry" resulted in one of the most famous comic book characters of all time 3 years later in the book Amazing Fantasy # 15 (1962). This is the very first appearance of Spider-Man, the cover was penciled by Jack Kirby and inked by Steve Ditko.