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So I found this bug crawling around near my kitchen sink. There were two others, but not any sort of swarm. I think they're some sort of insect larva, as they don't have a bunch of legs like a millipede or woodlouse, but I have no idea what kind. There also seem to be several shed shells nearby, if that helps.
As for location this is in the upper Midwest.
Here's the top of the thing, with screwdriver for scale
And here's the underside.