Abstract
The centipedes brought from Torijima I. consist of two species of Lithobi-idae and one species of Henicopidae, all of which are the Holarctic elements.
Lamyctes guamus is the first example of the genus Lamyctes found in Japan. The diagnoses of the female are as follows; Ocellus presents, large one. Anten-nae short and 27 articles in a female but about 20 in other specimens. First two articles very large in comparison with the others. Prosternal teeth 2+2. Prefensor stout. Mandible with five teeth. Tarsus of 1-12 legs simple, unarmed. Coxal pores round, small, 2, 2, 2, 2 in female instead of 1, 1, 1, 1 in male.
Claw of gonopods in female obtuse and chitinous, basal spines 2+2, stout. Anal legs long as well as other species. Locality: Torijima I., Aug. 13, 14, 15, 1950, collected by Mr. I. Fujiyama.
The fact that Dr. Chamberlin reported this species from Guam in 1946 is very interesting from the zoogeographical point of view, as the Lithobiid centi-pedes wwrw not expected to bew found in such an area as Micronesia, Bonin Is., etc.
