Roderick Rose was an entymologist who injected himself with several mutagens transforming himself into a grasshopper like monster. He gained super strength, leaping ability and could create cocoons. His initial scheme was to create an army of less powerful Hellgrammites to serve him, but he was stopped by Batman and Creeper. He was later hired to kill Lex Luthor, but was defeated again by Superman. After this he sold his soul to the demon Neron for enhanced powers. He has since joined Intergang as an assassin for hire, clashing repeatedly with Superman. He appeared in the animated series Justice League Unlimited as a fighter in Roulette's Metabrawl, and later a member of the Legion of Doom. He also appeared in the show Batman the Brave and the Bold where he was almost managed to defeat Batman but was ultimately foiled by The Creeper.
The Hellgrammite appears as the villain in the second Supergirl episode.