Scopesis tegularis ( THOMSON , 1894)

Riedel, Matthias, H, Andres & Schmidt, Stefan, 2024, Revision of the Palaearctic species of Scopesis FÖRSTER (Hymenoptera, Ichneumonidae, Ctenopelmatinae), Linzer biologische Beiträge 56 (1), pp. 201-252 : 224-225

Scopesis tegularis ( THOMSON, 1894) (figs 15, 32, 48, 69, 89)

Original: Mesoleius (Scopesus) tegularis THOMSON, 1894: 2031 , ♀ ♁.

Lectotype: (♀) Hlm; De V (Lund), type examined by Horstmann.

D e s c r i p t i o n: ♀. Body length 8.5–9.5 mm. Flagellum with 40–44 segments; 1 st flagellar segment 5.5–5.7× as long as wide and 1.9–2.0× as long as 2 nd segment; 2 nd segment 2.6–2.8×, 3 rd segment 2.5× and preapical segment 1.5× as long as wide. Temple distinctly and roundly narrowed behind eye. OED 1.4–1.5× ocellar diameter. Face granulated, with fine superficial punctures. Clypeus slightly convex, not bulging medially, with sparse punctures and very small flat extension laterally; apical margin almost straight or slightly concave. Ventral mandibular tooth equal to or slightly larger than dorsal tooth. MI 0.4.

Mesoscutum granulate and with fine superficial punctures, dull. Notaulus impressed in frontal 0.25 of mesoscutum. Mesopleuron granulate and finely punctate, with some fine striae ventrally, dorsally with strong striae. Speculum with microsculpture, rather dull. Area superomedia without distinct carina; area petiolaris with obsolete carina medially. Lateral longitudinal and pleural carinae of propodeum usually complete. Hind femur 4.5–4.6× as long as wide. Inner apical spur of hind tibia 0.65× as long as hind metatarsus. Vein 2rs-m 0.7–0.8× as long as vein M between veins 2rs-m and 2-mcu. Vein 1cu-a slightly postfurcal by 1× its width. Nervellus of hind wing ± inclivous, intercepted in its apical 0.7. 1 st tergite 1.6–1.7× as long as wide, without latero-median carina. 2 nd tergite 1.2–1.3× as wide as long.

Color: Flagellum ochreous, black basally. Palps brown or yellow. Mandible except teeth, clypeus (sometimes reaching ventral margin of face) and tegula yellow. Hind edge of pronotum and spot on subtegular ridge reddish. 1 st to 4 th tergites red. Coxae, trochanters and trochantelli black; legs otherwise red; hind femur entirely brown or black; hind tibia reddish-yellow, infuscate in apical 0.2; hind tarsus black. Pterostigma yellow.

♁. Body length 9.0–10.0 mm. Flagellum with 40–43 segments; 1 st flagellar segment 5.3– 5.6× as long as wide and 1.7–1.9× as long as 2 nd segment; 2 nd segment 3.0×, 3 rd segment 2.5–2.9× and preapical segment c 2× as long as wide. Temple moderately roundly narrowed. OED 1.3× ocellar diameter. Clypeus transversely convex, not bulging medially, with sparse punctures. Ventral mandibular tooth about as long as dorsal tooth. MI 0.4–0.5.

Mesopleuron finely striate dorsally, granulate and with superficial punctures ventrally; speculum with microsculpture or almost smooth. Area superomedia sometimes with weak lateral carina. Area petiolaris with complete carina. Hind femur 4.4–5.2× as long as wide. Vein 1cu-a postfurcal by 1× its width. 1 st tergite (2.0)–2.3–2.6× as long as wide, without latero-median carina. 2 nd tergite 1.0–1.1× as long as wide.

Color: black. Flagellum brownish, rarely ochreous. Palps, mandible except teeth, clypeus, face, often scape and pedicel ventrally, sometimes collar, wide hind edge of pronotum, tegula and sometimes subtegular ridge yellow. Postscutellum sometimes reddish. 1 st tergite black; 2 nd to 4 th tergites red. Fore and mid coxae with apical yellow spots, fore and mid trochanters and trochantelli mainly yellow; hind trochanter black; legs red; hind femur black; hind tibia yellowish, infuscate in apical 0.3–0.4. Hind tarsus black. Pterostigma ochreous.

Hosts unknown.

Var. ♁: One specimen from Llangristiolus, Anglesey / United Kingdom ( EDI): Flagellum with 40 segments ; 1 st flagellar segment 6.3× as long as wide and 1.8× as long as 2 nd segment; 2 nd segment 3.1× and 3 rd segment 2.8× as long as wide. Hind femur 4.7× as long as wide. 1 st tergite 2.0× and 2 nd tergite 1.25× as long as wide. Color: Fore and mid femora brown. Fore and mid tibiae and tarsi cream-yellow, with brown external stripes. Hind femur black ; hind tibia brownish, with ivory internal stripe; hind tarsus black. Metasoma black; 2 nd tergite with diffuse dark reddish shine apically. Palps except brown distal palpomeres, mandible, clypeus, face, scape ventrally, tegula, hind edge of pronotum, spot on subtegular ridge, apical marks on fore and mid coxae and fore and mid trochanters and trochantelli entirely yellow. This specimen probably represents a melanistic variant of Sc. tegularis .

Hosts unknown. D i s t r i b u t i o n: Transpalaearctic, studied material from France, Germany, Sweden, Russia Far East (Kamtchatka) and United Kingdom.