Centistidea bulbosa Liu and Polaszek 2024, sp. n.

Centistidea bulbosa Liu and Polaszek, sp. n. urn:lsid:zoobank.org:act: F8C91E62-6A9C-4B87-9A94-5B28D7CF37AC (Figure 2) Diagnosis Body length 1.7 mm, light yellow (Figure 2 (a)); head 1.7 × as wide as long, 1.3 × wider than mesoscutum in dorsal view; eyes 4.8 × longer than temple in dorsal view; temple remarkably constricted behind eyes in dorsal view; POL:OD:OOL = 1.0:2.0:4.2 (Figure 2 (b)); face 1.3 × wider than high; clypeus 1.9 × wider than medial length (Figure 2 (c)); antenna longer than body, with penultimate and ultimate flagellomeres 2.6 and 3.1 × longer than wide, 1 st as long as 2 nd (Figure 2 (d)); mesonotum with coarse punctures anteriorly, notauli clear, crenulated to anterior 1/2; scutellar sulcus uncrenulated; scutellum with large punctures laterally, largely polished medio-posteriorly, hind depressions large, oblong, in contact (Figure 2 (e)); propodeum with distinct median carinae just reaching costulae (Figure 2 (f)); vein 1-R1 0.3 length of pterostigma (Figure 2 (g)); T1 weakly striate apically (Figure 2 (h)); T2 1.9 × wider than median length; T3 only half length of T2 (Figure 2 (k)); ovipositor sheath 0.7 × length of hind basitarsus, with long and short setae apically (Figure 2 (j)). Description Female. Body length 1.7 mm, fore wing length 1.8 mm (Figure 2 (a)). Head. 1.7 × as wide as long, 1.3 × wider than mesoscutum. Eyes 4.8 × longer than temple in dorsal view. Temple smooth, impunctate, except minute setose punctures and shiny, remarkably constricted behind eyes in dorsal view (Figure 2 (b)). Ocelli large, distance between fore and hind ocellus indistinctly shorter than minor axis of a hind ocellus, POL: OD:OOL = 1.0:2.0:4.2. Frons flat with extremely fine transverse wrinkles. Vertex between eye and hind ocellus shiny and polished, except some short transverse wrinkles behind hind ocelli. Face (Figure 2 (c)) smooth, polished, indistinctly convex medially, transverse, 1.3 × wider than high. Clypeus 1.9 × wider than medial length, nearly glabrous and polished. Length of malar space 1.4 × basal width of mandible. Antenna (Figure 2 (d)) slightly longer than body, with scape, pedicel and 1 st, 2 nd, penultimate and ultimate flagellomeres 1.7, 1.8, 4.3, 4.3, 2.6 and 3.1 × longer than wide, 1 st as long as 2 nd, flagellomeres following 4 th gradually shortened to apex. Mesosoma Length:width:height = 1.8:1.0:1.3. Mesonotum (Figure 2 (e)) shiny with coarse punctures anteriorly, becoming indistinct to polished at posterior margin, notauli obvious, crenulated to anterior 1/2. Scutellar sulcus slightly curved, extremely narrow, concave, uncrenulated. Scutellum very shiny with large and shallow punctures laterally, largely polished medio-posteriorly, hind depressions large, oblong, in contact with other. Propodeum (Figure 2 (f)) shiny, with distinct median carinae just reaching costulae, distinctly punctate along anterior border, posterior parts polished, anterior part 2.7 × longer than middle length of metanotum. Mesopleuron highly polished, impunctate. Legs. Hind femur (Figure 2 (i)) 2.8 × as long as its widest part. Length of hind femur:tibia: basitarsus = 1.6:2.2:1.0. Basitarsus of hind leg 0.9 × as long as tarsomeres 2–5. Wings. Fore wing (Figure 2 (g)): pterostigma, 2.7 × as long as its widest part; vein 1-R1 present, 0.3 length of pterostigma; vein r:2-SR:2-M = 1.0:6.0:2.2, 1-SR:1-M = 1.0:5.3, 1-CU1:2- CU1 = 1.0:1.1; first discal cell of fore wing 1.2 × wider than high. Hind wing (Figure 2 (g)): vein M+ CU:1-M:r-m = 2.0:2.4:1.0. Metasoma. Slightly shorter than mesosoma. T1 (Figure 2 (h)) weakly striate apically, spoon-shaped, 2.4 × longer than its subapical maximum width, distinctly narrowed antero-medially. T2 (Figure 2 (k)) long, about as long as wide. T3 only half length of T2, indistinctly longitudinally striate. Hypopygium not reaching apex of metasoma. Ovipositor sheath 0.7 × length of hind basitarsus, with long and short setae apically (Figure 2 (j)). Colour. Light yellow (Figure 2 (a)). Palpi and spurs pale yellow. Antenna (except scape, pedicel and apical segment yellow-brown) brown. Legs pale yellow to slightly yellow-brown at apex. Wing membranes hyaline, pterostigma (more yellow inside), veins light yellow-brown except 1-CU1 thicker and darker. Male Similar to female, except body length 1.9 mm and legs longer with hind femur 3.5 × longer than its maximum width. Host According to the label: Pupa/parasite of mango bark eating borer. Material examined (NHMUK) Holotype: 1♀, Brunei, Bukit Sulang, nr. Lamunin. NE Stork, No. NHMUK101639288. Paratypes: 1♀, same data as holotype except No. NHMUK101639267; 1♂, Malaysia, Sabah, CH Sim, 16 November 1987, host: pupa/parasite of mango bark eating borer, No. NHMUK101639286; 1♂, Indonesia, Sulawesi, Toraut (1180 m), JS Noyes, 14 April–14May 1985, No. NHMUK101639281. Distribution BRUNEI; INDONESIA: Sulawesi. Etymology The specific name ‘ bulbosa ’ derives from the Latin, referring to the bulb-like distinctly projecting eyes. Remarks This species is similar to C. crenulator Ranjith and van Achterberg, 2019, but differs in the following characters: scutellar sulcus not crenulated (distinctly crenulated in C. crenulator); temple markedly constricted and short (less constricted and longer in C. crenulator); and vein 1-R1 less than half length of pterostigma (1-R1 distinct longer than half length of pterostigma in C. crenulator).