Orthocentrus Gravenhorst 1829

GenusOrthocentrusGravenhorst, 1829 Orthocentrus Gravenhorst, 1829: 358–359. Type species: Orthocentrus anomalus Gravenhorst, 1829, by subsequent designation in Westwood, 1840: 59. Diagnosis. The Western Palaearctic species are small to relatively large (fore wing 2–5 mm long) orthocentrines. Head in dorsal view strongly transverse to almost cubic (Fig. 1). Face densely punctate, papillate or aciculate on smooth or granulate background. Clypeus fused with face, forming uniformly convex surface; lower edge of clypeus usually rounded or rarely straight to weakly truncate; labrum usually hidden, but sometimes visible (Figs 2 D, 3 E, 4 E, F, 5 C, 6 B, 7 D, E). Scape usually long, subcylindrical. Mandibles usually bidentate, narrowed apically, lower tooth much shorter than upper tooth, visible in frontoventral view, but sometimes mandibles twisted, and thus lower tooth is vestigial and not visible. Subocular sulcus present to absent. Notauli present anteriorly or absent. Epicnemial carina present laterally and ventrally. Pleural carina present (Fig. 6 C). Propodeum usually with lateral longitudinal, lateromedian longitudinal and posterior transverse carinae present (Fig. 6 E). Fore wing with vein 3 rs-m present or absent, areolet (if closed) sessile or petiolate, quadrate or pentagonal (Figs 2 C, 3 C, 5 A, B, 6 F). Hind wing with nervellus reclivous, inclivous or vertical, usually broken, but rarely second abscissa of Cu entirely absent. First metasomal tergite from smooth and shiny to granulate, wrinkled or rugose (Figs 2 F, 3 G, 4 G, H, 5 D, E, 6 G, H, 7 H, I). Ovipositor straight or upcurved, with or without dorsal subapical notch, at most 0.5 × the length of the hind tibia; ovipositor sheath setose except basally, parallel-sided to widened distally. Key to females of Western Palaearctic species of Orthocentrus with ivory / yellow marks on the vertex