Five male specimens of Neobisium (Parobisium) pygmaeum (ELLINGSEN) were collected in northern districts of the Kanto Plain. A full redescription of the male is given based on the examination of the specimens collected. The change of the genus for the present species to belong to was proposed based on the fact that the morphological characteristics of the males are different from those of the genus Neobisium, being consistent with those of the Microbisium.
