Scientific name: Phanaeus demon As the scientific name suggests, it is characterized by devilish horns and the iridescent, reflective bumps on its thorax. Like other rainbow scarab beetles, it may feed on animal feces, decaying mushrooms, and animal carcasses. It's also a species featured in BRUTUS, so it's recommended! Please note that we do not offer a guarantee against grade deterioration during shipping. The image is of the individual from Mexico that will be shipped. I measured it, and it was 18mm.