Ichneumon genator, Riedel, 2018

Riedel, Matthias, 2018, Contribution to the Siberian species of Ichneumon LINNAEUS (Hymenoptera, Ichneumonidae, Ichneumoninae), Linzer biologische Beiträge 50 (2), pp. 1509-1562 : 1515-1516

Ichneumon genator nov.sp. ( figs 3 , 24 , 41, 47, 66)

M a t e r i a l e x a m i n e d: Holotype: ♀ " 1-5 vii 2003, 2000 m, SW Tannu-Ola Mt rng, Sogly vill, SW Tuwa reg., S Siberia, leg. Vastchenko" (coll. Riedel). Paratype: ♀ "E Siberia, lake Baikal, Baikalo-Lenskiy reg., Cordon Onkholoi, 19.vii.2005, leg. Berlov" (coll. Riedel).

D e s c r i p t i o n: Body length 16 mm. Antenna stout and slightly lanceolate, with 36 flagellomeres; 1 st flagellomere 1.6x longer than wide, 4 th flagellomere square, widest flagellomeres 0.58x as long as wide; preapical flagellomere 0.65x as long as wide. Temple slightly and roundly narrowed behind eye. OOD 1.4. Occiput and frons densely and coarsely rugose-punctate, finely granulate. Central face with coarse transverse striae, face otherwise punctate, facial orbit with scattered punctures. Clypeus large and wide, with rather dense punctures, smooth between punctures. Mandible thick, with parallel sides or slightly widened apically, teeth blunt, lower tooth much smaller than the upper one. Gena strongly widened ventrally, 1.4x as wide as eye, with scattered punctures in ventral half. Malar space 1.4x as long as width of mandibular base and 1.5x as long as 1 st flagellomere. Genal carina widely interrupted ventrally; hypostomal carina narrow.

Mesosoma covered with brownish hairs. Mesoscutum densely rugose-punctate but shining. Mesopleuron and metapleuron coarsely striate-punctate; coxal carina present. Scutellum slightly elevated, 1.4x wider than long, with rather dense punctures. Area superomedia square; costula absent. Area petiolaris without lateral border. Hind coxa coarsely punctate, without scopa or ventro-internal edge (but with scattered punctures apico-ventrally in paratype). Hind femur 2.9-3.0x longer than wide, densely punctate. Hind tibia with c.12 denticular spurs externally, mainly in apical 1/2. Tarsomeres moderately widened, 3 rd mid tarsomere c.1.35x longer than wide.

Metasoma strongly oxypygous, hypopygium short. Postpetiolus strongly widened, lateral field punctate, c.0.6x as wide as the median one, both fields with rather strong regular aciculation. 2 nd tergite 0.68x as long as wide. Gastrocoelus impressed, with ridges; thyridium slightly oblique, c.0.7x wider than the interval. 2 nd and 3 rd tergites very finely rugose-punctate, not distinctly striate medially. Ovipositor sheath slightly extending behind metasomal apex. Color: Black. Ring on flagellomeres 8/9-13/14, scutellum and small round spots on 6th

and 7 th tergites ivory. Mandible except teeth, side of clypeus and frontal orbit red; red spot on frontal orbit widened dorsally and reaching lateral ocellus. Collare and hind edge of pronotum, tegula, subtegular ridge and spot on prescutellar carina red. 2 nd and 3 rd tergites completely red or 3 rd tergite with narrow black basal band (in paratype). Coxae, trochanters and femora black; tibiae and tarsi reddish; hind tibia darkened in apical ¼- 1/5, hind tarsomeres completely red or with darkened tips. Wings with slightly yellowish tint, pterostigma brown.

Males unknown.

T a x o n o m i c a l r e m a r k:Thenewspeciesrunstogroup G 4 sensu HILPERT. It is closely related to Ichneumon mandibulatus nov.sp., but can be differentiated by the widely interrupted genal carina, longer malar space, wider scutellum, stouter hind femur and larger number of denticular spurs on hind tibia.

Figures

Figs 1-4: Habitus of: (1) Ichneumon berlovi nov.sp.; (2) I. brevipunctatus nov.sp.; (3) I. genator nov.sp.; (4) I. granulatus nov.sp.

Figs 21-26: Head from dorsal of: (21) Ichneumon berlovi nov.sp.; (22) I. brevipunctatus nov.sp.; (23) I. breviscopulatus nov.sp.; (24) I. genator nov.sp.; (25) I. granulatus nov.sp.; (26) I. hakassiacus nov.sp.