Syspasis lineator (FABRICIUS, 1781)

Riedel, Matthias, 2021, Revision of the Palaearctic species of Syspasis TOWNES, 1965 (Hymenoptera, Ichneumonidae, Ichneumoninae), Linzer biologische Beiträge 53 (2), pp. 775-810 : 785-787

Syspasis lineator (FABRICIUS, 1781) (figs 5, 19, 38, 52)

Original: Ichneumon lineator FABRICIUS, 1781: 432 . H o l o t y p e: (♁) (London), type not studied. syn. Ichneumon trilineatus GMELIN, 1790: 2679 , type lost, synonymized by HELLÉN (1936). syn. Ichneumon umbraculosus GRAVENHORST, 1829: 199, synonymized by RASNITSYN (1981). syn. Ichneumon binotatus STEPHENS, 1835: 147 , type lost, synonymized by PERKINS (1953). syn. Ichneumon brischkii RATZEBURG, 1852: 170 , type lost, synonymized by YU & HORSTMANN

(1997). syn. Ichneumon adulator TISCHBEIN, 1881: 172 , type lost, synonymized by YU & HORSTMANN

(1997). syn. Ichneumon calculosus BERTHOUMIEU, 1903, synonymized by DILLER & HORSTMANN (1997). M a t e r i a l e x a m i n e d: 8♀♀ and 15♁♁ from Belgium, France, Japan, Netherlands,

Poland, Russia (Siberia), Switzerland, Spain, United Kingdom.

D e s c r i p t i o n: ♀: Body length 12-14 mm. Flagellum with 37-40 flagellomeres, slightly lanceolate; 1 st flagellomere 2.9-3.5× and 2 nd flagellomere 2.6-3.0× longer than wide; widest flagellomeres 1.0-1.1× wider than long. Temple strongly and roundly narrowed behind eye. OED 1.0× ocellar diameter. Frons transversely rugose-punctate, granulate. Face punctate, granulate medially. Clypeus with weak preapical median impression. Gena with scattered punctures ventrally. MI 0.8-1.0. Hypostomal carina slightly elevated. Mesosoma with short pale brownish hairs. Side of pronotum finely punctate dorsally and rugose ventrally. Notaulus impressed frontally. Lateral field of mesoscutum with superficial punctures, distinctly granulate, dull. Mesopleuron punctate, partly striate-rugose; speculum smooth. Metapleuron rugose-punctate; juxtacoxal carina usually present. Scutellum moderately elevated, slightly wider than long, with scattered punctures and lateral carina in basal 0.2. Area basalis roundly bulging forward medially. Area superomedia large, finely rugose, slightly longer than wide, horseshoe-shaped, usually open apically; anterior transverse carina posterior to its middle. Area externa punctate or finely rugulose. Area petiolaris finely rugose-punctate, without lateral carinae. Coxae densely punctate; hind coxa with diffusely bordered scopa. Hind femur densely punctate, with scattered punctures ventrally, 3.9-4.3× longer than wide. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 1-2× their diameter; vein 2m-cu reaching its middle. Vein 1cu-a ± interstitial or slightly postfurcal. Lateral field of postpetiolus c. 0.7× as wide as median field, the latter with c. 12 fine longitudinal striae. Gastrocoelus distinctly impressed, with longitudinal ridges. Thyridium slightly oblique, 1.7-2.5× wider than the interval between thyridia. 2 nd tergite 0.80-0.85× as long as wide. 2 nd to 3 rd tergites punctate; 2 nd tergite aciculate medially and 3 rd tergite only basally. 4 th tergite almost smooth. Ovipositor sheath shortly extending behind metasomal apex (by 0.2-0.5× length of 7 th tergite).

Color: black. Stripes or rings on flagellomeres 8/10-13/14, sometimes facial orbit, usually frontal orbit, usually small spot on vertex, sometimes stripe on outer orbit, sometimes collar, hind edge of pronotum, subtegular ridge, and side of scutellum ivory. Tergites blackish; apical margins of 2 nd and 3 rd tergites usually reddish. Legs black, sometimes ± reddish; fore tibia yellowish frontally, mid and hind tibiae ± reddish subbasally. Wings hyaline; pterostigma brown or black. ♁: Body length 10-15 mm. Flagellum with 35-40 flagellomeres, 1st flagellomere 2.5×

and 2 nd flagellomere 2.0× longer than wide. Tyloids on flagellomeres 8/10-15/17, linear or long-oval, maximally 0.8× as long as the flagellomere. Temple strongly and roundly narrowed behind eye. OED 0.8-1.0× ocellar diameter. Gena with scattered punctures ventrally, 0.75-0.9× as wide as eye. MI 0.3-0.4. Notaulus indistinct. Mesopleuron punctate, slightly rugose. Metapleuron with scattered punctures centrally. Scutellum wider than long, with lateral carina in basal 0.3-0.6. Area basalis bulged forward medially, but without distinct median tubercle. Area superomedia square or wider than long, horseshoe-shaped; anterior transverse carina posterior to its middle. Area externa finely punctate and granulate. Area petiolaris rugose-punctate, with ± distinct lateral carina. Hind femur densely punctate, 3.5-4.0× longer than wide. Fore metatarsus without apical tooth. Lateral field of postpetiolus 0.7-1.0× as wide as median field, the latter with c. 10 fine longitudinal striae. Thyridium oblique, 2.0-2.6× wider than the interval between thyridia. 2 nd tergite 0.9-1.0× as long as wide. 2 nd and 3 rd tergites densely punctate and granulate, aciculate medially. 4 th and 5 th tergites granulate and often ± punctate.

Color: black. Palps, mandible except teeth, side of clypeus, wide facial orbit, sometimes spot below antennal sockets, frontal and outer orbits, often spot on scape, collar and hind edge or upper margin of pronotum, subtegular ridge, sometimes prescutellar ridge, side of scutellum and sometimes spots on fore and mid coxae ivory. Sometimes 2 nd tergite ± reddish and tergites with narrow reddish apical margins. Hind coxa sometimes partly reddish; legs reddish or brownish; fore (and mid) tibiae yellow frontally, tarsi ± infuscate. Pterostigma brown or black.

Var. ♁ from Japan: Legs black; fore and mid femora apically and fore and mid tibiae frontally yellowish.

Hosts: Abraxas grossulariata (LINNAEUS, 1758) (Lep., Geometridae ) (Lausanne, ZSM), Cucullia sp. (Lep., Noctuidae ) (ZSM).