Ground beetles of the species `` Promecognathus laevissimus '' are specialised predators of the cyanide millipede `` Harpaphe haydeniana '' , countering the hydrogen cyanide which makes these millipedes poisonous to most carnivores .
Ground beetles of the species `` Promecognathus laevissimus '' are specialised predators of the cyanide millipede `` Harpaphe haydeniana '' . They can counter the hydrogen cyanide which makes these millipedes poisonous to most carnivores .