The head, thorax and legs are red or orange, the elytra are a black, but sometimes look metallic blueish. Between 3 and 5 mm in length. The head is held downwards but still visible below the thorax, the antennae have the last 3 segments expanded. Family Cleridae, subfamily Orthopleurinae. During May I was finding between 3 to 5 of these beetles every day in my bedroom window. I have no idea where so many are coming from inside the house. San Cristobal de Las Casas, Chiapas, Mexico. Outside is Oak-pine forest, 2,200 meters.