Revision of the Siobla metallica group (Hymenoptera: Tenthredinidae) Author Niu, Gengyun Author Wei, Meicai Author Taeger, Andreas text Zootaxa 2012 3196 1 49 journal article 45421 10.5281/zenodo.280105 59624a82-2bc8-486e-bd8c-375ccba1249f 1175-5326 280105 Siobla glabroorbita Niu & Wei , sp. nov. ( Figs 4 d, 7e, 8g , 13a, 22b) urn:lsid:zoobank.org:act:B4E37EAB-3CEC-48C1-A0A9-28B84E5E4588 Description. Holotype : Ƥ. Length, 17 mm ( Figs 4 d, 7e). Body with feeble metallic blue luster; palpi dark brown, labrum and small spot on middle of mandible, apical four antennomeres white, apical margin of each coxa, each trochanter yellow white; femora, tibiae and tarsi of fore and middle legs yellowish brown, and those of hind leg orange brown, outer margin of apical sheath orange brown. Apical 1/6 of forewing feebly infuscated, stigma pale brown, hind wing sub-infuscated hyaline. Hairs on dorsum of head pale brown, hairs on thorax pale. Punctures on clypeus, inner orbit and postocellar area dense, punctures on inner orbit sparse and fine, temple and lateral sides of prescutum nearly impunctate ( Fig. 22 b), mesoscutellum and metascutellum densely punctured, mesepisternum densely and coarsely punctured with venter densely punctured, mesepimeron densely microsculptured with dorsum densely punctured; metepisternum shiny, posterior margin of metepimeron shiny, dorsum of metepimeron densely punctured; 1st abdominal tergite shiny, anterior and lateral sides microsculptured with fine punctures, other tergites with transverse microsculpture. Hairs on dorsum of head straight, slightly shorter than diameter of median ocellus; hairs on mesoscutellum as long as diameter of median ocellus; hairs on other parts of scutum obviously shorter than diameter of median ocellus; hairs on pleuron slightly shorter than diameter of median ocellus. Clypeus truncate; malar space 0.8 × transverse diameter of median ocellus; head in front view with eyes converging below, lower interocular distance as long as eye height; anterior margin of supraantennal tubercle elevated, frontal ridge fine; middle fovea round, lateral fovea deep; interocellar and postocellar furrows obvious; postocellar area elevated, as high as top of ocelli, longitudinal carina obtuse, about 1.3 × as broad as long; lateral furrows broad and deep, slightly curved outwards, slightly divergent posteriorly; head behind eyes 0.8 × eyes in length in dorsal view, convex in middle and narrowing posteriorly. Antenna 0.9 × abdomen and 1.2 × head and thorax combined in length. Mesoscutellum acutely elevated, posterior slope shorter than anterior slope, with a narrow and sharp middle carina; posttergite with an obtuse middle carina; mesepisternum angularly elevated, ventral spur faint. Apex of hind tibia distinctly enlarged; metabasitarsus 5 × as long as broad, 0.9 × length of remaining 4 tarsomeres combined; hind inner tibial spur 0.4 × length of metabasitarsus. Hind wing with petiole of anal cell shorter than half length of cu-a. Ovipositor sheath as long as middle tibia, apical sheath and basal sheath subequal in length; lancet as in Fig. 8 g; apical and 4th to 6th serrulae as in Fig. 13 a. Male: Unknown. Etymology. The specific epithet, an adjective, refers to the polished orbits. Specimens examined. Holotype : Ƥ, Wanglang (32°51.6ʹN, 104°11.3ʹE), Sichuan, 24 July 2006 , Lu Zhuan leg., CSCSHT 0 0 810035 (CSCS). Distribution. China (Sichuan). Remarks. See the above key for the differences between S. glabroorbita and S. dian .