Chelonus (Baculonus) icteribasis sp. nov.

(Figs. 2 A–E)

Description

Holotype, Ψ, length of body 4.0 mm, of fore wing 3.2 mm.

Head. Antennal segments 16; third segment 1.2 times fourth segment, length of third and fourth segments 5.1, 5.0 times their width, respectively; third­fifth antennal segments rather elongate (Fig. 2 B); length maxillary palp 0.7 times height of head; head in dorsal view roundly contracted behind eyes; length of eyes 1.5 times temple in dorsal view; temple rounded posteriorly; OOL: OD: POL=23: 10: 30; vertex evenly convex, finely and transversely striate­rugose; temple finely and longitudinally striate­ rugose in front view; frons concave, striate­rugose around antennal sockets; face striate­rugose (Fig. 2 A); clypeus shiny, finely punctuate, apical margin truncate medially (Fig. 2 A); length of malar space 1.6 times basal width of mandible.

Mesosoma. Length of mesosoma 1.4 times its height; pronotum finely reticulaterugose; mesoscutum evenly convex, reticulate­rugose, more strongly and coarsely rugose postero­medially; scutellum punctuate medially, rugose laterally, more or less protruding above level of mesoscutum; scutellar suture comparatively deep with 4 carinae; mesopleuron coarsely reticulate­rugose; propodeum coarsely reticulate­rugose with transversal carina and 4 blunt tubercles.

Wings. Length of fore wing 2.5 times its width; length of radial cell along metacarp 0.8 times pterostigma; vein 1­M comparatively close to vein C+SC+R; vein 2­R1 just present; 3­SR rather short; r: 3­SR: SR1= 3: 1: 10; SR1 complete and straight; parastigma not swollen; 1­CU1: 2­CU1= 9: 4; vein CU1b present (Fig. 2 C).

Legs. Hind coxa completely smooth and setose; length of hind femur, tibia and basitarsus 3.4, 4.7 and 5.3 times their maximum width, respectively; length of hind tibial spurs 0.3 times hind basitarsus.

Metasoma. Length of metasoma 1.9 times its maximum width in dorsal view. Carapace oval in dorsal view, two third of it longitudinally striate, and reticulate by weaker and transversal rugae basally; Carapace with two somewhat strong dorsal carinae basally, widening gradually from its base and somewhat narrowing from its apical one third (Fig. 2 D, E).

Colour. Black; scapus and third antennal segment yellowish­brown, rest of antennal segments dark brown; palp light yellow; mandible brown except basally black; pterostigma and most of veins blackish brown, veins of basal wing light yellow; fore wing more or less infumated below pterostigma, parastigma light yellow; basal one third of carapace yellowish; legs almost yellowish­brown totally; hind coxa black but apically yellowish­brown; hind femur blackish brown; hind tibia yellow medially; all telotarsi black.

Material

Holotype, Ψ, China: West Tianmu Mt., Zhejiang province, 2–4.VI.1990, Junhua He, No. 905136 (ZJUH). Paratypes, 2Ψ, China: Tianmu Mt., Zhejiang province, 2–4.VI.1990, Junhua He (ZJUH).