Published Jan 1965 by Marvel.
Cover art by Steve Ditko. First appearance of the Scorpion in The Coming of the Scorpion!, script by Stan Lee, art by Steve Ditko; J. Jonah Jameson pays Dr. Stillwell to turn Mac Gargan into the Scorpion to try to capture Spider-Man. Stillwell's formula makes Gargan become more evil than he originally was and the Scorpion goes on a rampage and is finally stopped by Spider-Man. Reprinted in Marvel Tales # 15 and 158. 
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