Abstract
A histiostomatid, colonized from a most common Dermaptera, Gonolabis marginalis Dohrn, 1864 (Anisolabididae) in central Japan, was studied taxonomically. In spite of a discrepancy, shorter leg I tarsus in the deutonymph, it was identified as Histiostoma mahunkai Fain, 1974. Taxonomic information, on the male and female, recorded in this article. The most records on Histiostoma phoresy on Dermaptera have been one-sided on H. polypori Oudemans, 1900 and H. feroniarum(Dufour), 1839 on a European Dermaptera, Forficula auricularia Linnaeus, 1758 (Forficulidae). Very recently, three other phoretic species of histiostomatids recorded from three Australian giant earwigs, Titanolabis colossea Dohrn, 1864 (Anisolabididae). This species, H. mahunkai, was the first record from Japan, and the combination was also the first record with Dermaptera.
