title: Revision of Siobla (Hymenoptera, Tenthredinidae) from Japan.
abstract: The Japanese species of the sawfly genus Siobla Cameron, 1877, are revised and keyed. The following nine species are recognized: S. apicalis Takeuchi, 1929, S. ferox (Smith, 1874), S. hirasana Takeuchi, 1929, S. jucunda (Mocsáry, 1909), S. metallica Takeuchi, 1929, S. sturmii (Klug, 1817), S. japonica, sp. nov., S. pulchra, sp. nov., and S. takeuchii, sp. nov.  Siobla pacifica (Smith, 1874) is synonymized with S. sturmii. Lectotypes are designated for Macrophya ferox Smith, 1874, Macrophya pacifica Smith, 1874, Encarsioneura jucunda Mocsáry, 1909, and Siobla grandis Matsumura, 1912. Previous records of S. ruficornis (Gimmerthal, 1834) and S. villosa Malaise, 1931, from Japan have been found erroneous. Siobla jucunda is newly recorded from Japan.
authors.affiliation: Department of Zoology, National Museum of Nature and Science,4-1-1 Amakubo, Tsukuba-shi, Ibaraki, 305-0005 Japan.; Email: shinohar@kahaku.go.jp.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Shinohara
authors.affiliation: College of Life Science and Technology, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, P. R. China; Email: weimc@126.com.
authors.forename: Meicai
authors.initials: M
authors.lastname: Wei
authors.affiliation: College of Life Science and Technology, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, P. R. China.; Email: gyniu@126.com.
authors.forename: Gengyun
authors.initials: G
authors.lastname: Niu
mesh_terms: D000818:Animals; D005260:Female; D007564:Japan; D008297:Male; D014863:Wasps / Q000033:anatomy & histology* / Q000145:classification*