This is a juvenile form of the Cereal leaf beetle (Oulema melanopus) after being parasitized by Tetrastichus julis, a parasitoid wasp which lays its eggs inside the larva of the beetle. The eggs hatch.
Forget about the bogeyman in the cupboard or the monster under the bed. These creepy crawlies really might be in your house (or nearby, at least), so enjoy these coloured scanning electron micrograph portraits . if you dare.