We had a kid at the 2005 ORNL science camp who found this paper wasp nest with larvae. We weren't happy about him pulling it off the roof, but since he did I figured I should take advantage of the "photo op"! (See what I mean about mixing middle-schoolers and wasps!?) These larvae are fed caterpillars by their older sisters. Before they pupate they will spin a cap above the cells. After pupation they chew through the cap and emerge as as an adult.