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Review of the Genus Exetastes (Hymenoptera: Ichneumonidae: Banchinae) from South Korea
Tribe Banchini isa cosmopolitan tribe comprising 228 species within 11 genera whereas only three genera (Banchus, Exetastes and Rynchobanchus) have been recorded from Korea. The species of this tribe is koinobiont endoparacitoid that parasitize exposed large caterpillars, especially those pupating in the ground. For this reason, tribe Banchini has very short ovipositor when compared with that of other tribe. It is easily distinguished from two other tribes by the nervellus which is intercepted far from the middle and by having large areolet and very short ovipositor.
Genus Exetastes belonging to Banchini is a largest group with 150 worldwide species. The Eastern Palaearctic region is represented by 48 species, but only five species, E. albiger Kriechbaumer, E. fornicator (Fabricius), E. ichneumoniformis (Gravenhorst), E. ishikawensis (Uchida) and E. komarovi Kokujev have been reported from Korea. Exetastes is distinguished from two other genera by the presence of prepectal carina and by having pointed upper tooth of mandible. The objectives of this work is to review the genus Exetastes and to report two unrecorded species (E. longipes Uchida and E. sapponensis Uchida) from Korea. Here we provide the diagnosises and photographs of Korean Exetastes species.
