The genus Sphegina Meigen (Diptera, Syrphidae) in a biodiversity hotspot: the thirty-six sympatric species in Kambaiti, Myanmar Author Hippa, Heikki Author Steenis, Jeroen Van Author Mutin, Valeri A. text Zootaxa 2015 3954 1 1 67 journal article 10.11646/zootaxa.3954.1.1 44878647-9450-4895-ad32-d1fc79eb30ea 1175-5326 288397 AA3DB71F-AD9A-4205-889B-FB212E367A37 Sphegina (Asiosphegina) forceps sp. n. Figs 3 B, 25A–C MALE. Body length 5.0– 5.5 mm , wing length 4.2–4.6 mm . Head. Face strongly concave and strongly projected antero-ventrally; frontal prominence moderately developed (somewhat similar to Figs 1J, L). Width of vertex at anterior ocellus:width of head 1:4.1; depth of occipital fossa 1/5 of the width of an eye in dorsal view. Width of face:width of head 1:3.9. Face with the ventral 1/2 yellow, dorsal 1/2 black and both densely pale pollinose. Gena shiny yellow, usually darkened posteriorly. Frons and vertex shiny black; lunula shiny brown; frons with a narrow pale-pollinose band just posterior to the frontal prominence; the pile very short, erect and pale. Frontal prominence with rather deep medial depression. Occiput dull black. Antenna brownish; basoflagellomere elongated [length:width 1:2.5]; arista almost bare basally and distinctly pilose apically. Thorax. Colour black, postpronotum yellow, postalar callus brown, overall slightly pale pollinose (in 2 specimens pleura more or less extensively yellow); scutum mainly black with yellow sides, with the pile adpressed, golden; scutellum shiny black, rather semitriangular, the pile short, pale and adpressed, with a pair of thin, long, yellow setae at apical margin. Wing. Hyaline, stigma yellow. Legs. Pro- and mesoleg yellow, tarsomeres 4 and 5 obscure dark. Metaleg ( Fig. 3 B) coxa brownish; trochanter simple, yellow; femur yellowish to pale yellowish-brown, the apical 1/3 blackish, the submedial darker annulus brownish; tibia without apico-ventral tooth, brown, on apical 1/4 black, at extreme base yellow and the annulus (on the apical 1/2) pale yellowish; tarsus black entirely. Abdomen. Length ratio of tergites I, II, III and IV 1 :3.0:1.6:1.4. Colour of tergites shiny black, tergite III reddish or yellow on anterior 1/3–1/6, tergite IV with a narrow transverse yellowish macula at anterior margin; the pile reddish, short and adpressed, becoming longer laterally; tergite I with an oblique row of 3–4 thin, long, pale setae laterally; sternite IV ( Fig. 25 C) unusually symmetrical, black, the pile and the stronger postero-medial setae reddish or brown; sternite VI simple, black, the pile dark and short; sternites VII and VIII black, the pile dark. Genitalia. Figs 25 A, B. Note the symmetrical surstyli, the unusual cercus with a long posterior prong which is apically sclerotized, as well as the unusual aedeagus. The superior lobes are symmetrical. FEMALE. Unknown. Type material. HOLOTYPE . ♂, N.E. Burma , Kambaiti, 2000 m , 4.vi.1934 , R. Malaise ( SMNH , strongly damaged). PARATYPES . 1♂ with same data as holotype except 4.vi. ( NBC ); 1♂ with same data except 7000 ft , 12.v. ( SMNH ). Etymology. The name is Latin, forceps , pincers, referring to the pincer-like cerci. Discussion. Sphegina forceps is not especially similar to any other species. It may recall such species as S. forficata , S. nasuta and S. simplex but is at once distinguished by having an oblique row of slightly strengthened setae postero-laterally on sternite I instead of two or three strong setae in a longitudinal row at the actual lateral margin of the tergite. The male genitalia are quite unique: the cerci which are posteriorly elongated as a curved apically sclerotized lobe and the aedeagus with posteriorly directed ejaculatory hood, ejaculatory tube and aedeagal lobes are much unlike any other species.