Dolichomitus Smith, 1877

Pham, Nhi Thi, Broad, Gavin R. & Zwakhals, Kees, 2012, First record of the genus Dolichomitus Smith (Hymenoptera: Ichneumonidae: Pimplinae) from Vietnam, with description of one new species, Zootaxa 3519, pp. 77-84 : 78

Dolichomitus Smith, 1877

Closterocerus Hartig, 1847 . Ber. Naturw. Ver. Hartz 1846-47: 18. Type-species: Closterocerus sericeus Hartig , by monotypy.

Dolichomitus Smith, 1877 . Proc. Zool. Soc. London 1877: 411. Type-species: Dolichomitus longicauda Smith , by monotypy.

Mesoephialtes Schmiedeknecht, 1906. Opuscula ichneumonologica 3: 1014. Type-species: Mesoephialtes coracinus Schmiedeknecht (= Pimpla zonata Cresson ), by monotypy.

Diclosterocerus Viereck, 1914. U.S. Natl. Mus. Bul. 83: 45 [Replacement name for Closterocerus Hartig ].

Exeristoidea Viereck, 1924. Canad. Ent. 56: 202. Type-species: Ichneumon (Exeristoidea) watsoni Viereck (= cephalotes Holmgren), by original designation

Tuberculephialtes Ozols, 1962. Latvijas Ent. 6: 19. Type-species: Ichneumon tuberculatus Fourcroy , by original designation.

Paucdolichomitus Constantineanu & Pisica, 1970. An. Stiint. Univ. Al. I. Cuza Iasi. Mon. 2: 92. Type-species: Ephialtes imperator Kriechbaumer , by original designation.

Diagnosis. Body moderate to large sized (fore wing length 5–22 mm); clypeus with median apical notch, apical margin thin, emarginate; mandible not twisted; occipital carina complete, more or less concave mediodorsally; pronotum moderate to very long, epomia from entirely absent to short and distinct; mesoscutum from smooth, polished to finely and evenly punctate, pubescent, notauli moderately to strongly impressed anteriorly; epicnemial carina present ventrally and at least partially dorsally, mesopleural suture angled centrally; submetapleural carina from more or less complete to only present anteriorly; propodeum quite short and convex, usually with lateromedian longitudinal carinae or a deep furrow anteriorly; fore tarsal claw with lobe; metasomal tergite 2 with oblique grooves deeply impressed, extending about 0.5 the length of tergite, sometimes grooves weaker and shorter; tergites 3–5 often with tubercles; ovipositor projecting beyond apex of metasoma by 4.3–12.8 times length of hind tibia, with subapical lobe of lower valve partly enclosing upper valve.

Dolichomitus species can be confused with several other genera of Ephialtini with long ovipositors in the Oriental and Palaearctic regions. Townes's (1969) and Gupta & Tikar's (1976) generic keys should enable recognition of Dolichomitus . Useful distinguishing characters are as follows: clypeus normal (twice as wide as high in Ephialtes ); lower mandibular tooth at most slightly longer than upper tooth (lower tooth about twice as long as upper in Ephialtes ); mandible indistinctly punctate (striate in Paraperithous ); propodeum usually with distinct lateromedian longitudinal carinae or furrow (carinae or furrow absent or weak in Exeristes and Liotryphon ); fore tarsal claw with basal lobe (some Exeristes lacking lobe); metasomal tergites not coarsely punctate (coarsely punctate in Exeristes ); tergite 2 with oblique grooves usually strong (weak in Exeristes , Flavopimpla and Liotryphon ); tergite 2 with relatively narrow apical impunctate area (broad, at least 6x puncture diameter, impunctate area in Liotryphon ); male with setae on fore wing leading edge normal length (markedly elongate in Ephialtes and Townesia ); ovipositor with lower valves apically lobed, partially enclosing upper valve, and lacking small teeth on upper valve (lower valves not lobed in Exeristes , Flavopimpla , Liotryphon , verging on lobed in Paraperithous but with row of minute teeth on upper valve).