Barichneumon nigrithorax, Riedel, 2021

Riedel, Matthias, 2021, A New Contribution to the Knowledge of the East Palaearctic Ichneumoninae (Hymenoptera, Ichneumonidae), Linzer biologische Beiträge 53 (1), pp. 171-240 : 183-184

Barichneumon nigrithorax nov.sp. ( figs 14 , 32, 34-35)

H o l o t y p e: (♀) "KGZ [ Kyrgyzstan], Batken, Distr. Batken, Turkest. Geb., 7 km SW Kara-Bula, 39°53´16´´N / 70°51´39´´E, 1880-2000 m, 12.- 13.06.2010, leg. E. & J. Hüttinger" (Linz).

D e s c r i p t i o n: ♀: Body length 10.0 mm. Flagellum with 34 flagellomeres, filiform; 1 st flagellomere 1.5× longer than wide, 7 th flagellomere square, widest flagellomeres 1.3× wider than long. Temple moderately and roundly narrowed behind eyes. OED 1.3× and OOD 1.5× ocellar diameter. Frons and face densely punctate, smooth and shining between punctures. Clypeus flat, 3.0× wider than long, with very scattered punctures and subapical row of fine punctures; apical margin sharp and straight. Gena as wide as eye, with scattered punctures ventrally. Mandible with two teeth, lower tooth smaller than upper tooth. MI 0.5. Genal carina reaching hypostomal carina close to mandibular base; hypostomal and genal carinae low.

Mesosoma covered with grey hairs. Notaulus pit-like impressed at frontal margin of mesoscutum. Mesoscutum with rather dense punctures anteriorly and with very scattered punctures in posterior third, shining. Mesopleuron and metapleuron rather densely punctate dorsally, with scattered punctures ventrally; mesosternum with very scattered punctures. Juxtacoxal carina present. Scutellum slightly elevated, slightly wider than long, with fine very scattered punctures, without lateral carina. Area basalis with median tubercle. Area superomedia heart-shaped, about as long as wide, rugose; anterior transversal carina reaching its apical third. Area externa punctate. Area petiolaris strongly impressed, apically 0.7× as wide as basally, rugose-punctate. Mid coxa with very scattered punctures. Hind coxa densely and finely punctate basally and internally, with very scattered punctures and strong ochreous scopa covering 2/3 of coxal length. Hind femur with scattered punctures in ventral half, 3.4× longer than wide. Hind tibia with 2-3 denticular spines apico-externally. Claws not pectinate. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 2× their width; vein 2m-cu slightly distad its middle. Vein 1cu-a postfurcal by 1× its width.

Metasoma oxypygous. Postpetiolus moderately widened, without dorsal carina; lateral field densely punctate; median field densely rugose-punctate. Gastrocoelus moderately impressed, with 3-4 longitudinal ridges. Thyridium slightly oblique, 0.6× as wide as the interval. 2 nd tergite 0.8× as long as wide. 2 nd to 4 th tergites densely punctate, 2 nd and 3 rd tergites rugose-punctate medially. Seen dorsally, ovipositor sheath reaching behind metasomal apex by length of 7 th tergite.

Color: black. Flagellomeres 10-13 with yellow stripes. Mandible except teeth reddish. Frontal orbit with narrow reddish-yellow stripe. Coxae and trochanters black; legs including trochantelli otherwise red; hind tarsus blackish. Wings slightly infuscate; pterostigma reddish-brown.

♁ unknown.

R e m a r k: This new species is characterized by the black meso- and metasoma, ± scattered punctures of ventral mesosoma and mid and hind coxae, and strong scopa on hind coxa.

Figures

Figs 14-18: Habitus from dorsal: (14) Barichneumon nigrithorax nov.sp. ♀, (15) Coelichneumon sugillatops nov.sp. ♀, (16) Hoplismenus brevigena nov.sp. ♁, (17) Ichneumon haladai nov.sp. ♀, (18) Ichneumon melanator nov.sp. ♀.