Zoologische Mededelingen, 82 (June 2008)A. Haris: Sawflies (Hymenoptera: Symphyta, Tenthredinidae) from Vietnam and China

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Beleses sapaensis spec. nov.

(figs 2, 6, 8, 22)

Material.― Holotype, ♀ (RMNH): “NW. Vietnam, Tonkin, Hoang Lien N. R., 10 km SW. Sa Pa, c. 1550 m, 24.x.1999, C. v. Achterberg, RMNH 99”.

Female.— Head golden yellow with large black spot extending from clypeus to hind margin of head; spot narrowed between antennae, widened on ocellar area forming a pentagonal patch and narrowed again on vertex. Two black bands connect upper hind margins of eyes with hind margin of head. Posterior surface of head behind vertex and temples black. Palpi and mouthparts yellow except dark brown apices of mandibles. Scape black except a yellow line on outer surface. Pedicell and antennal segments 3-4 black. Fifth antennal segment black with white apex. Antennal segments 6-9 white. Thorax black with following yellow: hind corner and wide lateral margin of pronotum, parapteron, arrow-shaped spot on apical corner of middle mesonotal lobes, yellow rounded spot on anterior part of mesopleuron, longitudinal zigzag band on posterior part of mesopleuron, posterior band on katepimeron, entire metepisternum, mesoscutellum (but not mesoscutellar appendage), cenchri, elongated spots behind cenchri, oval central spot on metascutellum and area behind metascutellum (fig. 22). Legs dark yellow. Black: basal spot on hind coxae, hind tibial ring, basal third of hind basitarsus (except a narrow yellow ring at very base), apical 2 tarsal segments of anterior leg and all claws. Wings hyaline. Venation dark brown. Costa yellow with dark brown apex. Stigma dark brown with white yellow basal spot. Abdomen dark brownish black with following yellow: triangular membrane and wide posterior margin of propodeum, narrow anterior margins of tergites 2-7, narrow posterior middle margin of tergite 8, tergite 9 dominantly (except a larger marginal spot and a small middle spot on each side) and tergite 10 entirely. Margins of tergites laterally broadly and triangularly widened but not confluent. Basal sternites entirely yellow, apical 2 sternites black with yellow hind margin. Ovipositor black with 2 elongated yellow basal spot. Head sporadically punctured, shiny but moderately densely and moderately deeply punctured on frontal area. Clypeus truncate. Pentagonal frontal area missing. Fore ocellus sunken. Middle supra-antennal pit elongated. Malar space missing. Postocellar furrows shallow, straight and reach hind margin of head. OOL : POL : OCL = 13 : 8 : 15. Maxillar palp very long. Antenna long, filiform, about 0.9 × as long as total length of body. Ratio of antennal segments: 15 : 13 : 50 : 71 : 36 . 20 : 17 : 15 : 17. Pronotum and mesonotal lobes slightly shiny with moderately dense but not uniform shallow punctures. Mesoscutellum with small, shallow and hardly visible punctures, dull. Mesoscutellar appendage slightly shiny with horizontal wrinkles. Metascutellum granulated. Mesosternum and posterior part of mesopleuron smooth and shiny. Most of mesopleuron uniformly, moderately densely and deeply punctured, moderately shiny. Mesoscutellum flat. Length of inner hind tibial spur : apical width of hind tibia: 21 : 13. Length of hind basitarsus : length of inner hind tibial spur: 68 : 21. Subapical tooth of claw shorter than apical (fig. 8) without basal lobe. Sawsheath short and blunt in dorsal and in lateral views (figs 2 and 6). Length: 9.5 mm.

Male.— Unknown.

Notes.— Although several new species of Beleses were described recently from the Oriental region (Wei, 2002; Wei & Nie, 2002), the new species does not show any similarity with them. It is related to B. tianmuensis spec. nov. from China. The differential diagnosis of the two species is given at the end of the next description. The specific name refers to the place of capture.

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