Enytus huet Rousse et Villemant

Rousse, Pascal & Villemant, Claire, 2012, Ichneumons in Reunion Island: a catalogue of the local Ichneumonidae (Hymenoptera) species, including 15 new taxa and a key to species, Zootaxa 3278, pp. 1-57 : 16-17

Enytus huet Rousse et Villemant , sp. nov.

( Figs 9 e–f)

Diagnosis. The ovipositor abruptly upcurved and fore wing with vein 3Rs-m absent and 2Rs-m distinctly shorter than abscissa of M between 2Rs-m and 2m-Cu are reliable cues for generic identification. Enytus huet has head and mesosoma black, legs and metasoma yellow orange, with coxae 1–2 and all trochanters white. It is otherwise characterized by its propodeal carination with area basalis minute and petiolate, and its first metasomal tergite with a strongly enlarged postpetiole, about twice as wide as petiole.

Description. FEMALE (3 specimens). Fore wing length 2.6–3.0 mm.

Head. Temples moderately long, head slightly constricted behind eyes; occipital carina complete; whole head granulate with sparse, fine and long silver pilosity; inner margin of eye shortly indented above torulus; ocellar triangle equilateral, OOi = 1.4, IOi = 1.2; face sligntly raised centrally with a minute median protuberance; clypeus transverse, confluent with face, Ci = 6; apical margin of clypeus not impressed, sub-truncate; MLMi = 0.7; mandible moderately long, slightly tapered at apex and with two subequal teeth; flagellum with 20–22 segments, first flagellomere 1.5x longer than second, FLi1 = 5, FLi2 = 4.

Mesosoma. Short, about 1.5x as long as high in lateral view; granulate and sparsely punctate with moderately dense silver pilosity; mesoscutum subcircular in dorsal view, without notauli; epicnemial carina strong and reaching middle of pronotal hind margin; speculum alutaceous; propodeum coriaceous, area basalis minute, triangular and petiolate, anterior and posterior transverse carinae present as two inverted V-shapes, the posterior one medially obsolescent, postero-lateral margins of area superomedia hardly delimited. Tarsal claws with two strong basal comb teeth. Fore wing with cu-a vertical and distad to Rs&M, 2Rs-m about 0.5x as long as abscissa of M between 2Rs-m and 2m-Cu. Hind wing with distal abscissa of Cu1 absent, 1/Cu&cu-a subvertical and evenly arcuate.

Metasoma. Tergite I shorter than propodeum, petiole about as long as postpetiole which is about twice as wide as petiole; glymma short; tergite II about as long as wide apically and 0.7x as long as tergite I, thyridium hardly distinct; metasomal tergites alutaceous, shining; tergites III and following laterally with short and rather dense white adpressed pilosity; ovipositor strongly upcurved from its apical third, OTi = 0.4–0.5.

Color. Head black, palps and mandibles pale yellow, mandibular teeth brown; scape yellow, pedicel light brown, its ventral face yellowish; flagellum reddish brown; mesosoma black with ventral corner of pronotum reddish brown, tegula yellow; metasoma yellowish-orange with tergites 4–6 subapically infuscate; legs yellow, fore and mid coxae and all trochanters ivory white, hind tibia basally and apically infuscate, hind tarsus dark brown; wings hyaline.

MALE. Unknown.

Comments. The single Enytus reported within the studied area is Enytus apostata (Gravenhorst) . It is a well known species which distribution is mainly Palearctic. It has been doubtfully reported in South Africa ( Morley 1926). Enytus huet differs from E. apostata by its general coloration, its mesosomal sculpture and its propodeal carination.

Distribution records. Reunion.

Type material. HOLOTYPE Ƥ ( MNHN EY 3885) Verbatim label data: La Réunion, Ste Rose / Forêt de Bois Blanc, alt. 790m, leg. Rousse 03/2004; ovipositor sheath partly broken. PARATYPES ( MNHN EY 6426–6427) 2Ƥ St Louis / Fenêtre des Makes, alt. 1630m, VI.2011, leg. T. Ramage.

Figures

FIGURE 9. Campopleginae (females), habitus and faces. a-b: Campoplex techer sp. nov. c-d: Dusona douraguia sp. nov. e-f: Enytus huet sp. nov. g-h: Eriborus cadjee sp. nov. i: E. cadjee, left hind tarsus, profile.