I was watching the old sci-movie, The Atomic Submarine the other night. The one-eyed, tentacled antagonist in the flying saucer instantly brought to mind everyone’s favorite aliens from The Simpsons. An earlier movie, Monster from the Ocean Floor had a similar creature that looks even more like a proto-monster from Rigel 7 (on the lobby card, anyway–it looks like crap in the film).
According Wikipedia and other uncited sources, the inspiration for Kang and Kodos was a cover of EC Comics Horror Tales.
My google fu isn’t up to finding an image of that particular cover. I’ll bet a Comic Book Guy-type Doper probably has a copy–or knows where it is online. Am I right?
Well, Kang and Kodos were created as a one-shot parody of Damon Knight’s “To Serve Man.”
As for their appearance – it’s a pretty generic mashup of alien monster cliches of the 50s – tentacles, big eyes, and helmets (the latter two were used, for instance in Mars Attacks!. I doubt it could be pinned down to any one source.