Chelonus (Microchelonus) staurorhytis sp. nov.

Figs 77–80

Material examined. Holotype: female, Baishanzu, Zhejiang Prov., China, 20.VII.2003, Hong Wu, No. 946956 (ZJUH) . Paratypes: 1 male, Nanling, Guangdong Prov., China, 23.VII.2003, Zaifu Xu, No. 20047714 ; 1 female, Longxi Mt., Fujian Prov., China, 16.VII.1991, Changming Liu, No. 20006982 .

Diagnosis. This new species is similar to C. (M.) bullatus sp. nov. (Fig. 15) considering the distinctly incurved metasoma, narrowed temples and carapace with yellowish band in basal 1/3, but the two species can be separated by the following characters: posterior excavation of head very deep (> 35%) (Figs 78G, 80H) (versus less deep (25–35%) in C. (M.) bullatus (Fig. 16H)); pterostigma 1.9 × longer than wide (Figs 78A, 80A) (versus 3.1 × (Fig. 16A)); metasoma in posterior view without convexity (versus with a plug-like convexity (Fig. 16F)).

Description. Holotype, female, length of body 3.1 mm, of fore wing 2.3 mm.

Head. Head transverse, width of head 3.2 × its dorsal length; occiput deeply excavated; antenna slightly widened medially; antennomeres 16, length of 3 rd and penultimate antennomeres 3.5 × and 1.0 × their width, respectively; eye 1.0 × as long as temple in dorsal view; OOL: OD: POL=22: 6: 13; temples narrowed posteriorly; frons and vertex very finely striate-rugose (Fig. 78G); face flat, longitudinally punctate-rugose; clypeus evenly convex, transversely striate-rugulose; face 1.9 × wider than high; eyes about parallel (Fig. 78F).

Mesosoma. Length of mesosoma 1.5 × its height; side of pronotum and mesopleuron moderately reticulate-rugose, ventrally densely setose (Fig. 78B); scutellum reticulate-rugose; scutellar suture comparatively deep, narrow, with carinae; propodeum coarsely rugose, lateral tubercles very small and weak (Fig. 78C).

Wings. Vein r straight; marginal cell 0.8 × as long as pterostigma; pterostigma 3.1 × longer than wide; r: 3-SR: SR1=12: 13: 48; SR1 straight; marginal cell 2.0 × longer than second submarginal cell; 1-CU1: 2-CU1=11: 27; 2-R1 indistinct (Fig. 78A).

Legs. Hind coxa punctate laterally; length of hind femur and tibia 3.5 × and 3.7 × their maximum width, respectively; length of inner hind tibial spur 0.4 × hind basitarsus.

Metasoma. Length of carapace 2.1 × its maximum width in dorsal view, widest at middle, apically rounded; base of carapace striate-rugose, up to middle, posteriorly rugose-striate (Fig. 78E); carapace in lateral view 2.6 × longer than high, posteriorly rounded, posterior height of metasoma 1.6 × its anterior height (Fig. 78D); apex of metasomal carapace distinctly incurved and ventral opening of carapace 0.7 × as long as carapace.

Colour. Body black; antenna bicoloured, 3 rd –8 th antennomeres yellow and remainder of antenna brown, palpi light brown; pterostigma light brown; middle of wing and its veins medium dark brown, but vein 1-M and parastigma light yellowish; legs almost entirely yellowish brown but apex of hind femur and hind coxa dark brown, hind tibia with rather long light base; carapace with yellowish band in basal 1/3.

Male. Antennomeres 22, antenna filiform, not widened medially (Fig. 80I); temple parallel-sided behind eyes (Fig. 80H); metasomal carapace narrowed to apex in dorsal view (Fig. 80E) and apically longer dorsally than ventrally (Fig. 80D); apical aperture in posterior view medium-sized, nearly round and median process of aperture horizontal and oval (Fig. 80F); other characters as in female.

Biology. Unknown.

Distribution. China (Fujian, Guangdong, Zhejiang).

Etymology. Named after the transversely striate-rugulose clypeus of this species: “ stauros ” is Greek for crosswise, “ rhytis ” is Greek for wrinkle.