Virgichneumon rhenanus (HABERMEHL, 1916), 2024

Virgichneumon rhenanus (HABERMEHL, 1916) , comb. nov. (figs 14, 36, 56, 73, 101)

Holotype: (♁) 3.192; Worms (8) 1904 Habermehl; Ichneumon rhenanus HAB. ♁ (Frankfurt), studied and comb. nov. by HILPERT (1992).

D e s c r i p t i o n: ♀. Body length 8.0-9.0 mm. Flagellum with 32-33 segments, moderately lanceolate; 1 st flagellar segments 1.8× as long as wide; widest segments 1.5× as wide as long; apical segments slightly narrowed. Temple distinctly and roundly narrowed behind eye (fig. 14). OED 1.3× and OOD 1.5× ocellar diameter. Frons and face transversally striato-punctate. Gena with longitudinally striated punctures dorsally and sparse punctures ventrally. MI 0.7-0.9. Genal carina reaching hypostomal carina away from mandibular base, hypostomal carina slightly elevated.

Notualus pit-like impressed at frontal margin of mesoscutum. Mesoscutum densely and coarsely punctate. Mesopleuron densely punctate, partly longitudinally striato-punctate. Epicnemial carina not bent or elevated ventrally. Scutellum wider than long, slightly elevated. Area superomedia heart-shaped, about as long as wide; distinctly posterior of its middle with costula (fig. 36). Area petiolaris not distinctly narrowed apically. Hind coxa densely punctate, with distinct scopa. Hind femur 3.4× as long as wide. External surface of hind tibia with few (2-3) denticular spines (fig. 101). Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 2× their width; vein 2m-cu reaching its middle. Vein 1cu-a postfurcal.

Postpetiole with latero-median carina; lateral field 0.8× as wide as median field, the latter coarsely rugose-punctate. Gastrocoelus deeply impressed. Thyridium indistinct (fig. 56). 2 nd tergite 1.3× as wide as long. 2 nd and 3 rd tergites coarsely punctate, 2 nd tergite longitudinally rugose medially; 4 th tergite superficially punctate. Ovipositor sheath slightly extending beyond metasomal apex.

Color: black. Basal flagellar segments often reddish. Flagellar segments 7-12 dorsally, stripe of frontal orbit opposite to lateral ocellus, collar, spot on subtegular ridge, scutellum and large median marks on 6 th and 7 th tergites ivory. 1 st to 4 th tergites reddish-brown; following tergites darkened. Coxae and trochanters black or brown; legs otherwise red; hind tibia narrowly darkened apically; hind tarsus brownish. Pterostigma yellowish. ♁. Body length 10 mm. Flagellum with 34-35 segments; 1st flagellar segment ca. 2× as long as wide. Tyloids on flagellar segments 6-12, long-oval, maximally 0.5-0.7× as long as their segments. Temple roundly narrowed behind eye. Frons transversely rugose-punctate. Face rugose-punctate; clypeus with fine longitudinal striae or rugae medially. Hypostomal carina low.

Notaulus impressed at frontal 0.2 of mesoscutum. Mesoscutum, mesopleuron and metapleuron coarsely punctate and shining; mesopleuron dorsally and posteriorly with ± distinct striation. Epicnemial carina low behind fore coxa, not bent forward ventrally. Scutellum moderately elevated, wider than long, lateral carina in basal 0.5. Area superomedia large, heart-shaped, almost square or wider than long; costula reaching posterior to its middle. Hind femur 3.2× as long as wide. Fore metatarsus with apical tooth. Ventral side of mid femur slightly concave in apical 1/3. Areolet almost pointed frontally, veins 2rs-m and 3rs-m almost joining each other in front; vein 2m-cu reaching its middle. Vein 1cu-a postfurcal.

Postpetiole widened, lateral field wide, 0.8× as wide as median field, the latter with coarse longitudinal rugosities. Gastrocoelus distinct. Thyridium large, oblique, about as wide as their interval. 2 nd tergite about as long as wide. 2 nd and 3 rd tergites with coarse punctures and median longitudinal rugae.

Color: black. Setae of mesoscutum brownish. Palps, mandible, clypeus laterally, wide facial and narrow frontal orbits up to lateral ocellus (fig. 73), stripe on outer orbit, scape ventrally, spot on collar and hind edge of pronotum, spot on subtegular ridge, scutellum on greater part ivory. Flagellum ± reddish ventrally. Postpetiole apically and 2 nd and 3 rd tergites entirely and 4 th tergite basally red. Legs except black coxae and trochanters red; hind femur often blackish; hind tibia in apical third and hind tarsus darkened to black. Pterostigma brown.

T a x o n o m i c a l r e m a r k s: For the discussion of the generical position of this species, see taxonomical notes under V. gemellus (GRAVENHORST) .

S t u d i e d m a t e r i a l: from Austria * ( ZSM), Germany and Switzerland * ( ZSM).