Sūta said:: Their group names are Hārakas, Bhīṣakas, Klāmakas, Reravākas, Piśācas, Vāhakas, Trāsakas and others. These are Bhūmi-Rākṣasas (earthly demons). They are slow-witted but harsh and tough in their exploits. They assume different sizes and shapes on different occasions. They roam about in places hitherto never seen. Such of them as have excellent strength and inherent vitality are remembered as Khecaras but they traverse the sky only to a very limited extent. They merely aim at flying. This universe is pervaded by hundreds and thousands of these Bhūmi-Rākṣasas and all sorts of insignificant Rākṣasa hordes. Different regions are occupied all round by different kinds of Rākṣasas.