Emphytopsis Wei & Nie, 1998

Wei, Meicai, Xu, Yi & Niu, Gengyun, 2011, Revision of Emphytopsis Wei & Nie (Hymenoptera: Tenthredinidae) with descriptions of seven new species from China and Japan, Zootaxa 2803, pp. 1-20 : 3-4

Key to species of Emphytopsis Wei & Nie, 1998

1 Clypeus shallowly incised to a depth about 0.4× length of clypeus (Fig. 6c); posterior half of abdominal tergites 3–8 on ventral side black, basal half of ovipositor sheath with a black strip (Fig. 6f); lower 0.7 of mesepimeron, first abdominal tergite entirely and metapleuron largely black (Fig. 6e); hind basitarsus 0.75× length of second to fifth tarsomeres together; malar space 0.9× diameter of middle ocellus; body length 8.5 mm .................................... E. lii Wei , sp. nov.

- Clypeus deeply incised to a depth not less than 0.6× length of clypeus (Fig. 1c); ventral side of abdomen entirely yellow brown (Fig. 2d), or only broad posterior margin of seventh tergite black (Fig. 1g); basal half of ovipositor sheath entirely yellow brown (Fig. 2f); mesepimeron entirely yellow brown or with a narrow black stripe (Figs. 2c, 3f); basal 0.3 of first abdominal tergite and metapleuron entirely yellow brown; hind basitarsus 0.9–1.05× length of second to fifth tarsomeres together; malar space 0.4–0.6× diameter of middle ocellus; body length 10–13 mm ............................................2

2 Abdominal tergites each with a posterior transversal band, if the band divided in the middle then distance between black bands in same tergite not longer than width of a cenchrus (Figs. 1a–6a); posterior margin of mesepimeron with a distinct black stripe (Figs. 2c, 4d, 5c), in one case the marginal stripe absent (Fig. 3f) but then postocellar area 1.5× longer than broad (Fig. 3b); claw with inner tooth slightly shorter than outer tooth or subequal in length (Fig. 1f); mesoscutellum roundly elevated; distance between cenchri 1.1–2 (usually 1.5–2) × the longest axis of a cenchrus. Eastern Chinese species........................ 3

- Abdominal tergites each with a pair of black spots, distance between black spots in each of basal three tergites at least as long as breadth of a spot (Figs. 7a, 8a, 9a); posterior margin of mesepimeron never with a black stripe; postocellar area 0.8–1.1× longer than broad; claw with inner tooth much shorter than outer tooth (Figs. 7d, 9c); mesoscutellum flat; distance between cenchri 1.1–1.2× the longest axis of a cenchrus. Japanese species................................................ 7

3 Postocellar area distinctly longer then wide, head in dorsal view roundly dilated behind eyes (Figs. 1b, 3b); anterior part of mesepimeron with a distinct black stripe (Fig. 3f), or mesepisternum densely punctured, most punctures large, about 0.3× diameter of lateral ocellus; black bands on abdominal tergites contiguous (Fig. 3a), or almost so (Fig. 1a)................ 4

- Postocellar area as long as wide or slightly broader than long, head in dorsal view parallel or subparallel behind eyes (Figs. 2b, 4b, 5b); posterior margin of mesepimeron with a black stripe, other parts of mesepimeron pale (Figs. 2c, 4d, 5c); punctures on mesepimeron small or absent; lateral black bands on each abdominal tergite distinctly separated at middle, distance not narrower than diameter of middle ocellus (Figs. 2a, 4a, 5a)....................................................... 5

4 Mesepisternum densely punctured, interspaces between large punctures very narrow; posterior margin of mesepimeron with a black stripe, other parts of mesepimeron yellow (cf. Fig. 4d); black stripe on posterior margin of seventh abdominal tergite extending to lateral corner (Fig. 1g); first abdominal tergite with distinct microsculpture; distance between cenchri 1.5× the longest axis of a cenchrus; lancet with about 21 serrulae, middle serrulae as in Fig. 1h........ E. punctata Wei & Nie, 1998

- Mesepisternum minutely and sparsely punctured, interspaces between punctures very broad; anterior part of mesepimeron with a distinct black stripe, other parts of mesepimeron yellow (Fig. 3f); black stripe on posterior margin of seventh abdominal tergite remote from lateral corner (Fig. 3e); first abdominal tergite without distinct microsculpture; distance between cenchri 2× the longest axis of a cenchrus; lancet with about 27 serrulae, middle serrulae as in Fig. 3j....... E. unimaculata Wei , sp. nov.

5 Ovipositor sheath clearly longer than metabasitarsus; OCL 1.5× as long as OOL; antenna dark yellow brown; middle serrulae each with 2 or 3 large outer subbasal teeth (Fig. 5e); mesepisternum evenly punctured........ E. zhongi Wei & Niu , sp. nov.

- Ovipositor sheath as long as metabasitarsus; OCL 1.2× as long as OOL; antenna dark brown or black; middle serrulae each with 4 or 6 medium sized outer subbasal teeth (Figs. 2g, 2h, 4f, 4g); mesepisternum densely or sparsely punctured........ 6

6 Mesepisternum densely punctured, frons with distinct fine punctures; antenna almost black (Fig. 4c); distance between cenchri

1.1× the major axis of a cenchrus; middle serrulae each with 6 outer subbasal teeth (Figs. 4g, 4f); membranous margin between 8th and 9th serrulae shorter than neighboring serrulae............................... E. nigricornis Wei & Xu , sp. nov. - Mesepisternum sparsely punctured, frons without fine punctures; antenna dark brown; distance between cenchri 1.5× the major axis of a cenchrus; middle serrulae each with 4 outer subbasal teeth (Fig. 2g); membranous margin between 8th and 9th serrulae longer than neighboring serrulae.......................................... E. quadrata Wei & Xu , sp. nov.

7 Abdominal tergites 1–8 each with a pair of equal sized black macula, distance between maculae within each tergite about as long as breadth of a macula (Fig. 9a); postocellar area slightly longer than broad (Fig. 9b); dorsal side of flagellum and apex of middle tibia dark brown; elevated area of mesepisternum microsculptured; middle serrulae in female lancet long and flat, with about 11–13 large teeth (Figs. 9e, 9f)................................................ E. flatoserrula Wei , sp. nov.

- Black maculae on basal tergites small and remote to each other, distance between them in same tergite much longer than breadth of a macula (Figs. 7a, 8a); postocellar area not longer than broad (Figs. 7c, 8b); flagellum and middle tibia entirely yellow brown; mesepisternum not microsculptured; middle serrulae in female lancet roundly protruding with minute teeth (Figs. 8d, 8e), or oblique with 6–8 large teeth (Figs. 7f, 7g).......................................................... 8

8 Postocellar area broader than long (Fig. 8b); sheath in dorsal view as broad as cercus; middle serrulae remote to each other and roundly protruding with many minute teeth (Figs. 8d, 8e)............................ E. shinoharai Wei & Niu , sp. nov.

- Postocellar area as long as broad (Fig. 7c); sheath in dorsal view 1.5× as broad as cercus; middle serrulae close to each other and oblique with 6–8 large teeth (Figs. 7f, 7g).......................... E. nigromaculata ( Takeuchi, 1952) , comb. nov.