Abstract
The larval form of Micropeplus fulvus japonicus SHARP, 1874 (Micropeplidae) belonging to the superfamily Staphylinoidea is described and illustrated for the first time. The larvae and adults of Micropeplus usually inhabit leaf-litter, and they apparently feed on the spores of moulds and other fungi. The material used in the present study was collected from leaf-litter in the Ikuta-Ryokuchi, Kawasaki City. The larvae of this genus may be distinguished from the known staphylinoid larvae by the outstanding features of the terga and head-capsule, and by the forms of the antenna, mouth-parts (labrum，mandible，maxilla and labium) and thoracic legs.
