Revision of the Oriental species of the genus Sphegina Meigen, 1822 (Diptera: Syrphidae) Author Steenis, Jeroen Van C7F0D01C-B182-4B93-AF73-E4154367B535 Research Associate, Naturalis Biodiversity Center, Leiden; Hof der Toekomst 48, 3823 HX Amersfoort, the Netherlands. jvansteenis@syrphidaeintrees.com Author Hippa, Heikki 546524AD-3BD1-4830-842F-EEEE7DF4799B Zoological Museum, Biodiversity Unit, FI- 20014 University of Turku, Finland. heikki.hippa@gmail.com Author Mutin, Valeri A. 625E0F27-4538-417D-9155-6141947F04EA Amur State University of Humanities and Pedagogy, Komsomolsk-na-Amure, 681000, Russia. valerimutin@mail.ru text European Journal of Taxonomy 2018 2018-12-20 489 1 198 journal article 22082 10.5852/ejt.2018.489 79a76a5f-97b3-47cc-9bff-086a712cf3e2 3830537 B234C53F-BB56-4F3D-B400-F214E19DCF90 Sphegina ( Asiosphegina ) achaeta Hippa, van Steenis &Mutin, 2015 Figs 6 A–B, 13A Sphegina (Asiosphegina) achaeta Hippa, van Steenis & Mutin, 2015: 58 . Type locality: Kambaiti, Myanmar ( holotype , ♂ , NHRS). Material examined MYANMAR • 1 ♀ ; “ N . E . Burma / Kambaiti, 7000 ft. / 7. v. 1934 / [leg] R . Malaise ” • 1 ♀ ; “ N . E . Burma / Kambaiti 7000 ft. / 14.5.1934 [leg] Malaise ”; NHM • 1 ♀ ; same data as for preceding; JSA • 1 ♀ ; “ N . E . Burma / Kambaiti, 7000 ft. / 9.6.1934 [leg] Malaise ”; JSA • 1 ♀ ; “ N . E . Burma , / Kambaiti, 2000 m . / 11.5.1934 [leg] Malaise ”; NHRS • 1 ♀ ; “ N . E . Burma / Kambaiti, 2000 m . / 12.5.1934 [leg] Malaise ”; JSA . Description Female LENGTH. Body 6.1–7.2 mm , wing 5.5–6.3 mm . HEAD. Face in lateral view concave, strongly projected antero-ventrally; frontal prominence strongly developed. Ratio width of vertex at anterior ocellus: width of head 1: 3.5–3.7; ratio width of ocellar triangle: width of vertex 1: 2.3–2.5; ratio length of ocellar triangle: length of frons 1: 3.5–4.2. Face dark brown; grey pollinose, long pilose along eye-margin. Hypostomal bridge black, long pale pilose. Gena and mouth edge dark brown with large subtriangular non-pollinose shiny area. Frons and vertex black, slightly pollinose, except anterior half of frons non-pollinose and shiny; pile short, light yellow. Frons with wide circular depression medially. Occiput black, light grey pollinose, light yellow pilose. Antenna dark brown with black setae dorsally on scape and pedicel; basoflagellomere short-oval, ratio width: length 1: 1.1; arista pilose, slightly more than 2.5 times as long as basoflagellomere. Fig. 6. Habitus, lateral view. A . Sphegina (Asiosphegina) achaeta Hippa, van Steenis & Mutin, 2015 , holotype, ♂ , Myanmar. B . S. (A.) achaeta , ♀ , Myanmar. C . S. (A.) albolobata sp. nov. , holotype, ♂ , Vietnam. D . S. (A.) amplistylus sp. nov. , holotype, ♂ , Philippines. E . S. ( A. ) apicalis Shiraki, 1930 , ♂ , Taiwan. F . S. ( A. ) apicalis , ♀ , Taiwan. Scale bars = 1.0 mm. THORAX. Colour dark brown to black, postpronotum red-brown; weakly brown pollinose with four grey pollinose vitta on entire scutum, pleuron entirely grey pollinose; scutum and pleuron with very short appressed light yellow pile. Scutellum semi-circular, black, brown pollinose, pile slightly longer than on scutum, with two widely set setae of medium length, ratio length of scutellum: length of seta 1: 1.5–1.7. WING. Entirely microtrichose; hyaline, stigma yellowish. Crossvein dm-cu meeting vein M obliquely and vein M 1 meeting vein R 4+5 perpendicularly. LEGS. Pro- and mesoleg with femora and tibiae dark brown to black on apical ⅔ to ¾; tarsi with tarsomeres 2–5 black. Metaleg with coxa dark brown, trochanter yellow; femur black with basal ¼ yellow, incrassate, ratio width: length 1: 3.4–3.6; tibia black and yellow biannulate, without apicoventral dens; tarsus entirely black, basitarsomere thin, ratio width: length 1: 3.8. ABDOMEN. Length ratio of terga I: II: III: IV: V 1: 2.4–3.5: 1.8–2.4: 2.4–2.8: 0.5–0.9; ratio width at posterior margin: medial length of tergum II and III 1 : 1.2–1.8 and 1: 0.6. Terga black, tergum II with sub-anterior light-brown fascia, anterior ⅓ of tergum III with yellow fascia; pile short, light yellow; tergum I, Fig. 8A with oblique row of 5 white and weak setae at lateral margin; sternum III rectangular, ratio width: length 1: 1.3–1.4; sternum IV trapezoidal, ratio width: length 1: 0.6–0.7 and sternum V trapezoidal with widest part anteriorly, ratio width: length 1: 0.7. Remarks Only known by the type material from Myanmar , Kambaiti ( Hippa et al. 2015 ) and the female specimens studied here from the same locality.