Chorinaeus Holmgren, 1858

Chorinaeus Holmgren, 1856; 320. Type species: Exochus fimebris Gravenhorst.

Polyrhabdus Walsh, 1873: 98 . Type species: Polyrhabdus cariniger Walsh.

Diagnosis. Face and clypeus evenly convex (Figs 1A, E, 3A). Frons without longitudinal lamella between antennal sockets (Figs 1B, C, 3B, C). Occipital carina complete (Figs 1E, 3E). Mandible with upper tooth longer than lower tooth (Figs 1D, 3D). Upper margin of pronotum with a broad, weak impression (Fig. 3F). Scutellum with lateral carina short to complete (Figs 1F, 2A, 3F, 4A). Mesopleural suture distinct (Figs 1E, 3E). Epicnemial carina present (Figs 1E, 3E). Metapleuron setose anteriorly (Figs 1E, 3E). Propodeum without anterior transverse carina (Figs 2A, 4A). Propodeal spiracle elliptic (Figs 2B, 4B). Fore and mid tarsal claws often pectinate. Hind tarsal claw usually simple, rarely pectinate. Fore wing without areolet (Figs 2E, 4E). First metasomal tergite with complete midlongitudinal and lateral carina (Figs 2B–D, 4B–D). Second metasomal tergite with complete midlongitudinal carina (Figs 2D, 4D), lateral carina short (Figs 2B, C) to absent (Figs 4B, C). Third metasomal tergite with midlongitudinal carina extending 0.7 × length of tergite (Figs 2D, 4D). Metasomal tergites without laterotergite (Figs 2C, 4C). Ovipositor slender (Figs 2C, 4C).

Biology. Larval parasitoids of Depressariidae, Gelechiidae, Geometridae, Gracillariidae, Heterobathmiidae, Noctuidae, Oecophoridae, Pyralidae and Tortricidae (Gauld et al. 2002; Yu et al. 2016).

Distribution. Cosmopolitan except Antarctic, Afrotropical and Australian regions.