Lathrobium species from Japan

General results

The material studied comprised sixteen species, nine of them previously described. Two of these species, one of them macropterous and one wing-dimorphic, had been known only from China and represent the first records from Japan. Six species, four from Honshu and two from Kyushu, are newly described. Based on a revision of type material, three species are excluded from Lathrobium. One of them is transferred to Pseudobium MULSANT & REY 1878 and one to Lobrathium MULSANT & REY 1878. The third species belongs to an undescribed genus of Lathrobiina. Two new synonymies are proposed, one in Pseudobium and one in Lobrathium. A syntype of L. pollens from Miyanoshita is designated as the lectotype, so that now the identity of the species is clarified and the type locality is unambiguously defined.

After the above changes, the Lathrobium fauna of Japan includes 105 described species, 100 of them micropterous, one wing-dimorphic, and four macropterous. The wingdimorphic and two of the macropterous species have been recorded also from China; three of the macropterous species are known also from the Russian Far East. Honshu hosts 74 micropterous species, Shikoku 16, and Kyushu seven. Three additional micropterous species have been recorded from Nishi-no-shima (2 species) and Awaji-shima (1 species).