Syspasis nigroapicalis, Riedel, 2021

Riedel, Matthias, 2021, Revision of the Palaearctic species of Syspasis TOWNES, 1965 (Hymenoptera, Ichneumonidae, Ichneumoninae), Linzer biologische Beiträge 53 (2), pp. 775-810 : 788-789

Syspasis nigroapicalis nov.sp. (figs 7, 29, 40, 54)

H o l o t y p e: (♀) Ridge Alashan, Yamata Gorge, China, 5–6.V.[1]908, leg. Kozlov [in Russian] (St. Petersburg).

P a r a t y p e: (♀) Enisey Gouv., Usun-shul, A. Jacobson, [back side] 12.IV. (St. Petersburg).

M a t e r i a l e x a m i n e d: 2♀♀ from Russia (Siberia) and Northern China.

D e s c r i p t i o n: ♀: Body length 10.5-11.3 mm. Flagellum moderately lanceolate, with 36 flagellomeres; 1 st flagellomere 2.0-2.3× and 2 nd flagellomere 2.0× longer than wide; 8 th flagellomere square; widest flagellomeres 1.5× wider than long. Temple wide, shortly parallel behind eye and moderately narrowed apically, dorsally 0.65× as wide as eye. OED 1.2-1.4× ocellar diameter. Frons densely rugose-punctate. Face densely punctate. Clypeus rather large, slightly convex, with slightly rounded sharp apical margin and scattered punctures. Mandible with two teeth, lower tooth much smaller than upper one, not bent inwards. MI 0.7-0.8. Genal carina reaching hypostomal carina close to mandibular base (distance 0.3-0.4× length of malar space). Mesosoma covered with short whitish hairs. Side of pronotum densely punctate dorsally and striate in ventral 1/2-2/3; epomia present. Mesoscutum finely granulate and densely punctate, slightly shining. Notaulus shortly impressed on frontal 0.15-0.2 of mesoscutum. Mesopleuron densely punctate, shining; speculum with scattered punctures. Metapleuron punctate, juxtacoxal carina present. Scutellum almost flat, 1.1× wider than long, punctate, with almost complete fine lateral carina. Area basalis with blunt but strong median tubercle. Area superomedia rather large, heart-shaped, as long as wide or slightly longer, smooth, sometimes confluent with area basalis; anterior transverse carina present, reaching area superomedia in its middle. Area externa smooth, punctate. Area petiolaris rugose-punctate, lateral carina distinct. Hind coxa densely punctate, with distinct whitish scopa apicoventrally (0.3× as long as coxa). Hind femur densely punctate, 3.8-3.9× longer than wide. Hind tibia with 6-8 denticular spurs apico-externally. Areolet almost quadrangular, frontal distance between veins 2rs-m and 3rs-m 1× their width; vein 2m-cu reaching slightly distad its middle. Vein 1cu-a interstitial. Metasoma strongly oxypygous. Petiolus as wide as high, with transverse striae laterally. Postpetiolus strongly widened, without dorsal carina, lateral carina present behind spiracles. Median field slightly elevated, punctate in apical half, with fine superficial striation in anterior half, lateral fields ± punctate. Gastrocoelus impressed, with some longitudinal ridges. Thyridium transverse or slightly oblique, 1.8- 2.0× wider than their interval between thyridia. 2 nd tergite 0.8× as long as wide, with dense coarse punctation, aciculate between gastrocoeli. 3 rd tergite coarsely punctate, 4 th tergite with finer superficial punctures. Ovipositor sheath slightly extending behind metasomal apex (by 0.3× length of 7 th tergite).

Color: black. Mandible except teeth and clypeus red; face ± reddish; frontal and vertical orbits with narrow yellow stripes. 8 th to 13 th flagellomeres with ivory stripes. Collar, hind edge of pronotum and prescutellar carina ivory. Upper margin of pronotum, tegula, lateral and apical margins of scutellum and apical band of postscutellum dark reddish in paratype, blackish in holotype. 1 st to 4 th tergites red (apical 0.3 of 4 th tergite black in holotype), following tergites black. Coxae and trochanters black; fore and mid coxae in holotype with red spots; mid and hind trochantelli reddish. Fore and mid legs reddish; fore tibia yellowish frontally. Hind femur black, red in basal 0.1-0.2; hind tibia reddish, black in apical 0.3-0.5; hind tarsus brownish. Wings with slightly yellowish infuscation; pterostigma yellowish or ochreous.

♁ unknown.

Hosts: unknown.