catu-vokāra-bhava:'four-group existence',is the existence in the immaterial world (arūpa-loka; s.loka),since only the four mental groups (feeling,perception,mental formations,consciousness,s.khandha) are found there,the corporeality group being absent.Cf.pañca-vokāra-bhava, eka-vokāra-bhava.(App.: vokāra).