Here's some useful advice for the world's ants: Whatever you do, stay away from the "bone-house wasp."

Scientists said on July 2 that they have identified a new species of spider wasp in southeastern China with grim conduct unlike any other creature. It crams the outermost chamber of the nests it builds for its offspring with piles of dead ants.

The female wasps do not hunt the ants for food, instead using the carcasses apparently to frighten off nest invaders.