Barichneumon nigroscutellatus, Riedel & Japoshvili, 2021

Riedel, Matthias & Japoshvili, George, 2021, New records of Ichneumonidae from Northwestern Sakartvelo (Georgia), with additions to the fauna of Lagodekhi reserve, Linzer biologische Beiträge 53 (1), pp. 241-288 : 276

Barichneumon nigroscutellatus nov.sp. ( figs 2-5 )

H o l o t y p e: (♀) " Georgia, Tsageri, Dogurashi, 1470 m alt., 42.678315°N, 42.810138°E, 5- 12.VI.2020, Malaise trap, leg. G. Japoshvili" (Tbilisi).

D e s c r i p t i o n: ♀: Body length 6.5 mm. Flagellum with 31 flagellomeres, slightly lanceolate; 1 st flagellomere 1.5× longer than wide, 4 th flagellomere square, widest flagellomeres 1.5× wider than long. Temple short, strongly and almost linearly narrowed behind eyes. Distance between lateral ocellus and eye 1.0× and between lateral ocelli 1.6× ocellar diameter. Occipital carina slightly edged medially. Frons densely punctate. Face densely punctate, partly rugose-punctate laterally. Clypeus slightly convex, with scattered punctures and subapical row of fine punctures; apical margin sharp and straight. Malar space 0.65× as long as width of mandibular base. Gena with coarse scattered punctures ventrally. Genal carina reaching hypostomal carina far from mandibular base, hypostomal carina slightly elevated.

Mesosoma covered with greyish hairs. Side of pronotum densely punctate dorsally, with striated rugae ventrally. Notaulus impressed in frontal 1/5 of mesoscutum. Mesoscutum densely punctate, shining. Mesopleuron densely punctate, with some striae at posterior margin. Speculum smooth and shining. Epicnemial carina reaching anterior margin of mesopleuron dorsally, moderately bent forward and slightly elevated behind fore coxae. Scutellum slightly convex, about as long as wide, with fine scattered punctures and with lateral carinae in basal 0.4. Area basalis with strong median tubercle. Area superomedia heart-shaped, slightly longer than wide; anterior transverse carina (costula) reaching area superomedia shortly behind its middle. Area petiolaris moderately impressed medially, transversely striate, sides slightly narrowed apically, apical width 0.8× frontal width. Mid coxa with very scattered punctures ventrally. Hind coxa with dense punctures, without scopa or other modifications. Hind femur 3.1× longer than wide, densely but superficially rugose-punctate. Hind tibia with c. 5 denticular spurs apico-externally. Areola pentagonal, frontal distance between veins 2rs-m and 3rs-m 2× their width. Vein 1cu-a interstitial.

Postpetiole moderately widened, with distinct latero-median carinae, densely punctate. 2 nd tergite 0.83× as long as wide. Gastrocoelus not impressed. Thyridium narrow, short, slightly oblique, 0.5× as wide as the interval. 2 nd to 4 th tergites densely punctate, smooth and shining between punctures. Ovipositor sheath moderately extending behind metasomal apex, seen from dorsal 0.8× as long as 7th tergite. Color: black. Stripes on flagellomeres 7-12, collar, spot on tegula, apical band on 6th

tergite and 7 th tergite mainly ivory. Short stripe on orbit opposite lateral ocellus reddish-yellow. Postpetiolus and 2 nd to 4 th tergites reddish. All coxae, trochanters and trochantelli black. Legs otherwise mainly red; fore and mid femora shortly blackish baso-ventrally; hind tibia blackish in apical 0.2; mid and hind tarsi blackish. Pterostigma black.

♁ unknown. R e m a r k: This new Barichneumon species is characterized by the entirely black mesosoma, densely punctate hind coxa without other modifications and the form of epicnemial carina which is forwardly bent and moderately elevated behind fore coxa. In the key of Barichneumon in RASNITSYN & SITYAN (1981: 583-585) this species runs to couplet 15 (16) B. perversus (auct. nec KRIECHBAUMER), but differs by the dense punctation of hind coxa and hind femur, lower number of flagellomeres and less strongly widened distal flagellomeres.

Figures

Figs 2-5: Barichneumon nigroscutatus nov.sp.: (2) face from frontal, (3) head from dorsal, (4) propodeum from dorsal, (5) basal tergites from dorsal.