It's an army worm - I don't know what you do about them.
Sherry

Maybe Yellow Striped Army Worm (Spodoptera ornithogalli)? Sherry knows all. :)

Thanks so much. I would have never thought so from the pictures, but I see it now. Mine just seems darker. I think he was after what's left of my corn. Thanks again!

They come in more than one color, Amy, and yours is the dark type - I think they're the prettiest.
Sherry

Army worms are ruinous to a cronfield during the time when the kernels are forming.

amy, armyworms are most famous (in some locations) for causing problems with lawns and other turfgrass areas. Whether or not you need to do something depends upon the population. When I was working with some golf courses in SC, we used to 'scout' for them in the late evening, when they come out to feed. Spray several locations with some diluted soapy water and patiently see if any of the critters come up to the surface where you can see them. If you see only a few, I sure wouldn't worry about it.

If you do decide that you must do something to control their numbers, spray in the late evening or your efforts are likely to be a waste. Please keep in mind that these guys are favorites of birds, who will be quite happy to find the carcasses in the morning. If you use a toxic chemical, the birds can be seriously harmed.