There are hundreds of these black beetles with red markings on the wings sitting in the sun on the side of my house and back door. They have shown up regularly the past week or so in the warm sunny afternoons. Before that I have only seen a few of them around. It's some kind of a beetle, but I can't seem to come up with a name for them. Any ideas? I live among cornfields, so maybe it's got something to do with the harvest stirring them up.