Brykella tamdaoensis spec. nov.
Material.― Holotype, ♂ (RMNH): “N. Vietnam, Vinh Phuc, Tam Dao N. P., c. 1000 m, 19.iv.2001, R. de Vries. RMNH 01”.
Figs 18-21. 18, Penis valve of Abeleses devriesi spec. nov. 19, Penis valve of Brykella tamdaoensis spec. nov. 20, Penis valve of Tenthredo (Tenthredina) nigricornis Malaise, 1945. 21, Penis valve of Tenthredo (Tenthredella) achterbergi spec. nov.
Male.— Head, antenna and palpi black. Clypeus and labrum white. Scape and pedicell brownish white. Thorax black. Posterior and lateral margin of pronotum and tegula brownish white. Cenchri white. Legs white. Middle and hind femora with wide brown longitudinal band on their basal third. This brown band reaches nearly the apex on fore femur. Basal ⅔ of all coxae, narrow ring on hind tibia, all tarsi and all tibial spurs black. Abdominal tergites 1-5 brownish red. Tergites 5 and 7 black with narrow longitudinal brownish red line in middle. Last (8th) abdominal tergite black (fig. 24). Abdominal sternites black. Wings brown infuscate but radial cells and cubital cells 1 and 2 with darker brown suffusion. Number of cubital cells: 3. Third cubital cell long elongated. Basalis and first recurrent vein parallel. Anal vein of fore wing forked, both branches straight, inner branch shorter. Hind wing with one closed middle cell. Anal cell of hind wing with long petiole. Nervellus meets petiole at its posterior three quarters. Head densely, uniformly and moderately deeply punctured, moderately shiny. Hind margin of head simple, without occipital carina. Hind corner of temple rounded. Head narrowed behind eyes. Pentagonal frontal area small and connected by 2 furrows to eyes and by 2 furrows to antennal bases. Clypeus truncate. Gena very short, linear. OOL : POL : OCL = 5 : 6 : 5. Ratio of antennal segments: 10 : 6 : 25 : 21 : 18 : 12 : 10 : 7 : 10. Mesonotal lobes with shallow, moderately dense and small punctures, moderately shiny. Mesoscutellum nearly smooth and shiny with only few sporadic punctures. Mesoscutellar appendage and postscutellum smooth and shiny. Mesopleuron with sparse minute punctures, shiny. Mesosternum smooth and shiny. Abdominal tergites smooth and shiny. Length of inner hind tibial spur : length of hind basitarsus : apical width of hind tibia: 11 : 33 : 9. Claw in fig. 14. Penis valve in fig. 19. Length: 8.8 mm.
Notes.— The new species is related to Brykella hainana Wei & Nie, 2002. Brykella hainana Wei & Nie has narrow and weekly sclerotised penis valve, figured in Wei & Nie, 2002 and black hind femur. The new species has wide and strongly sclerotised penis valve and hind femur is white. The specific name refers to the place of capture.
Brykella heinrichi Malaise, 1943 has scape and pedicel black, tergites 6-8 with white median triangles. Brykella brevis Wei, 2003 has pronotum and four anterior trochanters black. The males of B. heinrichi and B. brevis are unknown.