What the story of the old man in the mound?

This is a Philippine Fairy story concerning a dwarf. He is known as the 'Old Man of the Ant Hill or Mound'. This individual could cause harm or injury to anyone who accidentally kicks or destroys a Ant Hill which people believe to be the home of the dwarf. Thus people walking in forests ask permission by saying 'Excuse us, Old Man of the Mound' before passing by a Mound or a Ant Hill