While walking in the park, I found a bunch of strange, almost ladybug-looking larvae. I have submitted several photos of them to Bugguide.net. And tomorrow, I'll go back and collect some, and see what they turn into.
UPDATE: I collected several larvae, which have now pupated. They are in a container in Mrs. W's class, waiting to see what comes of them. But in the meantime, I think they are Chilocorus orbus, the twice-stabbed lady beetle.