Ichneumon inquinatops, Riedel, 2018

Riedel, Matthias, 2018, Contribution to the Siberian species of Ichneumon LINNAEUS (Hymenoptera, Ichneumonidae, Ichneumoninae), Linzer biologische Beiträge 50 (2), pp. 1509-1562 : 1519

Ichneumon inquinatops nov.sp. ( figs 6 , 27 , 50 , 69 )

M a t e r i a l e x a m i n e d: Holotype: ♀ " S Siberia, Hakassia reg., Sallyghen-Taiga mt. reg.,

2400 m, 5 vii 2005, leg. Osipov" (coll. Riedel). D e s c r i p t i o n: Body length 12 mm. Antenna filiform, with 40 flagellomeres; 1st

flagellomere 1.8x longer than wide, c.6th flagellomere square, widest flagellomeres c.0.8x as long as wide; preapical flagellomere 0.78x as long as wide. Temple moderately narrowed apically. OOD 1.7. Frons densely rugose-punctate. Face coarsely punctate and finely granulate, centrally with coarse transverse striae; clypeus with scattered punctures, smooth between punctures. Gena 1.3x as wide as eye, with scattered punctures in ventral half and fine striation dorsally. Malar space 1.35x as long as width of mandibular base and 1.25x as long as 1 st flagellomere. Genal carina complete, not interrupted ventrally. Hypostomal carina narrow.

Mesosoma covered with brownish hairs. Mesoscutum densely punctate, median field finely granulate, lateral field smooth between punctures. Mesopleuron and metapleuron densely rugose-punctate; coxal carina present. Scutellum slightly elevated, slightly wider than long, with scattered punctures. Area superomedia slightly trapezoid, widest basally, 1.1x wider than long; costula absent. Area petiolaris without lateral carina. Hind coxa densely punctate and granulate, without scopa. Hind femur 3.8x longer than wide, with scattered punctures in ventral 1/5. Hind tibia with 4-5 denticular spurs apico-externally. Tarsomeres slender, 3 rd mid tarsomere 1.55x longer than wide.

Metasoma strongly oxypygous, hypopygium short. Postpetiolus strongly widened, median field 1.6x wider than the lateral one, with fine regular aciculation; lateral field with coarser striae. 2 nd tergite 0.65x as long as wide. Gastrocoelus deeply impressed, with some strong ridges; thyridium transverse, c.0.6x as wide as the interval. 2 nd and 3 rd tergites densely and finely punctate, 2 nd tergite with fine longitudinal rugosity medially. Ovipositor sheath distinctly extending behind metasomal apex.

Color: Black. Scapus ventrally and flagellomeres 1-7 reddish-brown, flagellomeres 9-13 darker red, following flagellomeres black. Palps ochreous. Rings on flagellomeres 8-13, complete scutellum and narrow stripes on 6 th and 7 th tergites ivory. Mandible except teeth, collare, and hind edge of pronotum and tegula red. Metasoma black, 2 nd to 3 rd tergites with some diffuse dark reddish tint. Coxae and trochanters black; legs otherwise red; fore and mid femora basally and hind femur black except red basal 1/10. Wings with slightly brownish tint, pterostigma reddish.

Males unknown.

T a x o n o m i c a l r e m a r k This species belongs to the group F of HILPERT (1992) and runs to I. inquinatus WESMAEL in his key. It differs by a higher number of flagellomeres, slenderer 1 st flagellomere and completely red hind tibia and tarsus.

Figures

Figs 5-8: Habitus of: (5). Ichneumon hakassiacus nov.sp.; (6) I. inquinatops nov.sp.; (7) I. lanceolator nov.sp.; (4) I. mandibulatus nov.sp.

Figs 27-32: Head from dorsal of: (27) Ichneumon inquinatops nov.sp.; (28) I. lanceolator nov.sp.; (29) I. mandibulatus nov.sp.; (30) I. mesonotator nov.sp.; (31) I. nigrostigmaticus nov.sp.; (32) I. orientopodius nov.sp.

Figs 49-52: Scutellum and propodeum of: (49) Ichneumon hakassiacus nov.sp.; (50) I. inquinatops nov.sp.; (51) I. lanceolator nov.sp.; (52) I. mandibulatus nov.sp.

Figs 69-72: Postpetiolus and 2nd tergite of: (69) Ichneumon inquinatops nov.sp.; (70) I. lanceolator nov.sp.; (71) I. mandibulatus nov.sp.; (72) I. mesonotator nov.sp.