Ichneumon flavotibialis, Riedel, 2020

Riedel, Matthias, 2020, Contribution to the knowledge of Ichneumoninae of Siberia and Far East Russia (Hymenoptera, Ichneumonidae), Beiträge Zur Entomologie = Contributions to Entomology 70 (2), pp. 365-386 : 376-377

Ichneumon flavotibialis spec. nov.

urn:lsid:zoobank.org:act:07E8B9DD-3819-4F13-B988-5FAC6CBA25C3

(Figs 24,32,39)

Holotype:  “ Russia, Primorskiy kray, Anisimovka (= Kangaus ), 70 km East of Vladivostok, 43°11' N 132°41' E, 250 m, 07.VI.1993, leg. A. Taeger ” ( SDEI).

Description: . Body length 14.5 mm. Flagellum almost bristle-shaped, with 44 flagellomeres; 1 st flagellomere 2.0x longer than wide, 9 th flagellomere square, widest flagellomeres 1.3x wider than long; preapical flagellomere about as long as wide. Temple strongly and roundly narrowed behind eye, dorsally 0.75x as long as eye. Distance of lateral ocellus to eye 1.3x ocellar diameter. Frons coarsely rugose-punctate. Face densely and transversely rugosepunctate and granulate, matte. Clypeus with scattered punctures, ± shining. Gena as wide as eye, with rather dense punctures. Malar space 1.1x longer than width of mandibular base. Mandible with two teeth, lower tooth smaller than upper one. Genal carina complete, reaching hypostomal carina away from mandibular base; hypostomal carina slightly elevated.

Mesosoma covered with short brownish hairs. Notaulus impressed in frontal 1/6 of mesoscutum. Mesoscutum coarsely rugose-punctate, matte. Mesopleuron densely punctate, partly striate ventrally; speculum punctate. Metapleuron coarsely rugose; juxtacoxal carina present. Scutellum moderately elevated, 1.2x wider than long, with fine punctures, without lateral carina. Propodeum completely carinate. Area superomedia hexagonal, about as wide as long, rugose; costula reaching area superomedia in its middle, weak laterally. Area petiolaris with transverse rugae, lateral carina present. Outer dentiparal edge without tooth. Hind coxa with dense punctures, with small and slightly elevated scopa apico-ventrally. Hind femur with scattered punctures in ventral half, 4.1x longer than wide. Tarsomeres not widened, 3 rd mid tarsomere c. 1.6x longer than wide.

Areolet pentagonal, frontal distance of intercubiti 3–4x their diameter; 2 nd recurrent vein distal to its middle. Nervulus postfurcal by 2x its width.

Metasoma semi-amblypygous, hypopygium moderately elongate, about as long as the distance of its apical margin to metasomal apex. Postpetiolus strongly widened, lateral field 0.6x as wide as median field, with few striae; median field with fine regular striation. 2 nd tergite very wide, 1.35x wider than long. Gastrocoelus slightly impressed, almost smooth; thyridium narrow, slightly oblique, c. 0.7x as wide as the interval. 2 nd and 3 rd tergites very finely and densely rugose-punctate, ± matte; 2 nd tergite finely striate between thyridia. Following tergites finely punctate, shining. 2 nd to 4 th sternites with median folds. Ovipositor sheath not extending behind metasomal apex.

Color: Black. Flagellomeres 9-16, palps, mandible except teeth, clypeus, face except black median stripe, frontal orbit, ventral spot on scape, collare and wide upper margin of pronotum, two short paramedian stripes on mesoscutum, subtegular ridge, scutellum, fore and mid coxae, all trochanters, trochantelli, tibiae and tarsi yellowish. Femora blackish; fore and mid femora with frontal yellow stripes; hind femur narrowly yellowish apically. 2 nd tergite reddish-yellow, with wide triangular apical spot; 3 rd tergite black, with lateral reddish-yellow stripe; 2 nd and 3 rd sternites entirely and fold of 4 th sternite yellowish. Wings with slightly yellowish tint; pterostigma yellow.

: unknown.

Remark: Due its small and slightly elevated scopa on hind coxa, this new taxon belongs to the group E1 sensu HILPERT (1992). It differs from all known Palaearctic species of this group by a combination of semi-amblypygous metasoma, yellow paramedian spots on mesoscutum, absence of pale spots on apical tergites, and extended yellow coloration of legs.