Tenthredo (Tenthredella) achterbergi spec. nov.
Material.― Holotype, ♂ (RMNH): “NW. Vietnam, Tonkin, Hoang Lien N. R., 15 km W. Sa Pa. 15-21.x.1999, c. 1900 m, Malaise traps, C. v. Achterberg. RMNH 99”. Paratype, ♂ (RMNH): “NW. Vietnam, Tonkin, Hoang Lien N. R., 10 km SW. Sa Pa. 22-29.x.1999, c. 1550 m, Malaise traps, C. v. Achterberg. RMNH 99”.
Figs 30-31. 30, Nesoselandria alborobusta spec. nov. 31, Tenthredo (Tenthredella) achterbergi spec. nov.
Male.— Head and antenna black (fig. 31). White: labrum, clypeus, mandible (except brown apex), palpi, supraclypeal area till bases of supra-antennal tubercles, supra-antennal tubercles, gena, lower hind orbit and narrow inner orbit. Thorax black above except white cenchri, hind and lateral margin of pronotum and an oval spot on mesoscutellum. Mesopleuron white but with wide black dorsal and anterior bands. Katepimeron black with white upper band. Metepimeron entirely and metepisternum above black. Remaining part of thorax white. Legs white. Black: wide longitudinal band on hind coxa, hind tibia and hind tarsus entirely, longitudinal line on hind femur and middle tibia. Middle femur with short apical black strip (it may even occur on anterior femur as well, paratype). Anterior part of fore tibia more or less brown (paratype). First abdominal tergite black, other tergites dark brown. Abdominal tergites with narrow white hind margins. Tergites 3-5 with small whitish basal triangles placed centrally (blurred and hardly visible in paratype). Abdominal sternites white. Wings hyaline with very slight brownish infuscation at apex. Stigma, costa and venation brownish black. Head smooth and shiny. Clypeal emargination trapezoid and about 0.25 × as deep as clypeal median length. Head contracted behind eyes. Antenna long and slender, about as long as head, thorax and first 3 abdominal segments combined. Ratio of antennal segments: 14 : 8 : 39 : 40 : 35 : 28 : 20 : 19 : 21. OOL : POL : OCL: 3 : 7 : 3. Malar space linear. Supra-antennal tubercles moderately elevated but confluent with the frontal area. Frontal area narrow, very elongated surrounded by ridges. Head with postoccipital carina. Mesonotal lobes densely and uniformly punctured with small, moderately deep punctures, moderately shiny. Mesoscutellum densely and moderately roughly punctured, hardly shiny. Mesoscutellar appendage with fine microstriation. Metascutellum with dense, small but deep punctures in middle, moderately shiny. Mesopleuron with small, dense moderately deep and isolated punctures, moderately shiny. Punctures in middle of mesopleuron rough and moderately large. Mesosternum simple, without thorn. Mesopleuron hardly elevated. Mesoscutellum bluntly elevated. Abdominal tergites (including propodeum) with fine microstriation, shiny. Pubescence on head and thorax sparse, hyaline and very short, body nearly bald. Hind tibial spur straight and very long. Length of hind basitarsus : length of inner hind tibial spur : apical width of hind tibia: 63 . 40 : 15. Subapical tooth of claw as long as apical but wider (fig. 17). Penis valve in fig. 21. Length: holotype: 10 mm, paratype: 9.5 mm.
Notes.— The coloration of the new species slightly resembles to Tenthredo smitensis Singh & Saini, 1988: by its black body and white mandibles, face below antennae, lower ¾ of hind orbit, dorsal and ventral angles and posterior margin of pronotum, and mesoscutellum in part. The differences are: Tenthredo smitensis has the apical tooth of the claws much longer than subapical, black inner orbits, mesoscutellum with acute apex, distinctly punctured frontal area, and mesonotum with shiny interspaces between punctures (Singh & Saini, 1988; Saini, 2007); the new species has the apical and subapical teeth of the claws equal, white inner orbits, smooth and shiny frontal area, and mesonotum densely punctured without shiny interspaces. Otherwise the new species is not related to any other species of the genus.
Notes on other species