Review of the sawfly genus Empria (Hymenoptera, Tenthredinidae) in Japan Author Prous, Marko Author Heidemaa, Mikk Author Akihiko, Shinohara Author Soon, Villu text ZooKeys 2011 150 347 380 http://dx.doi.org/10.3897/zookeys.150.1968 journal article http://dx.doi.org/10.3897/zookeys.150.1968 1313-2970-150-347 Empria plana (Jakowlew, 1891) Tenthredo (Poecilostoma) hybrida Erichson in: Menetries in: Middendorff, 1851: 60-61. Primary homonym of Tenthredo (Tenthredo) hybrida Eversmann, 1847. Type locality: Udskoj Ostrog [Russia, Khabarovsk Krai, Udskoe]. Lectotype (here designated) female, ZISP. Labelled: "Poecilostoma hybrida* Erichs. Midd. R." [pale, handwritten], "Lectotypus ♀ Tenthredo (Poecilostoma) hybrida Erichson, 1851 design.: M.Prous & M.Heidemaa 2011" [red, printed], " Empria plana (Jakovlev 1891) det. M.Prous 2008" [white, printed]. Poecilosoma plana Jakowlew, 1891: 31. Type locality: Russia, Irkutsk. Holotype female, ZISP [examined]. Empria itelmena Malaise, 1931: 23, syn. n. Type locality: Kamtschatka, E[lisowo] [Russia, Kamchatka Krai]. Lectotype (here designated) female, NHRS. Labelled: "Kamtschatka Malaise", "E", "Typus", "Lectotypus ♀ Empria itelmena Malaise, 1931 design.: M. Prous & M. Heidemaa 2011" [red, printed], " Empria plana (Jakovlev 1891) det. M.Prous 2009" [white, printed]. Empria erichsoni Liston, 1995: 241. New name for Tenthredo (Poecilostoma) hybrida Erichson, 1851. Taxonomic affinities. Morphologically the closest species is Empria immersa (Klug, 1818), from which Empria plana can be distinguished by differences in the structure of serrulae (Fig. 17; http://www.morphbank.net/?id=694567) and penis valves (Fig. 28; http://www.morphbank.net/?id=578888). Externally, the Empria plana specimens from mainland Asia differ clearly from Empria immersa also by their pale clypeus (black in Empria immersa ) , which is, however, only partly pale or nearly black in Japanese specimens. In this regard, some disagreements concerning the taxonomic status of Empria plana should also be noted. Some authors treat this taxon either as a geographical form, or as a subspecies of Empria immersa ( Verzhutskii 1966 ; Zhelochovtsev and Zinovjev 1996 ), but Lindqvist (1972) argues that Empria plana (under the name Empria hybrida Erichson, 1851) is a separate species (followed also by Taeger et al. 2010 ). Because of the above mentioned differences between these two taxa, we concur with Lindqvist (1972) in treating them as distinct species. Such conclusion is supported also by current nuclear sequence data (Fig. 38). Host plants. Possibly Salix sp., see Verzhutskii (1966; 1981)under the name Empria immersa . Distribution. East Palaearctic. Specimens studied are from Japan (Hokkaido, Honshu), Mongolia, and Russia (Amur Oblast, Irkutsk Oblast, Kamchatka Krai, Khabarovsk Krai, Primorsky Krai). Figures 31-36. Penis valves of Empria . 31 Empria honshuana sp. n., paratype (NSMT200) 32 Empria liturata (USNM2051678_051) 33 Empria loktini (NSMT105) 34 Empria tridens (USNM2051678_024) 35 Empria japonica , paratype (NSMT009) 36 Empria sp. 1 (USNM2051678_040). The arrowheads illustrate the different position of valvular duct (upper right arrowhead) relative to the dorsal rim of valvura (lower left arrowhead) in Empria loktini (Fig. 33) and other species of longicornis-group (Fig. 34).