Syzeuctus spec. 1

Riedel, Matthias, 2021, The genus Syzeuctus FÖRSTER in the Western Palaearctic region and Central Asia (Hymenoptera, Ichneumonidae, Banchinae), with descriptions of 17 new species, Linzer biologische Beiträge 52 (2), pp. 1013-1098 : 1076

Syzeuctus spec. 1

M a t e r i a l: (♂) "[red label]; [hand-written] Alai Geb.; Zool. Mus. Berlin " (Berlin) .

D e s c r i p t i o n: Body length 8-9 mm. Antenna with 38 flagellomeres; 1 st flagellomere 4.4× longer than wide and 0.67× as long as eye; preapical flagellomere 1.2× longer than wide. Temple strongly and roundly narrowed behind eye, dorsally 0.4× as long as eye. OED 1.7× and OOD 1.8× ocellar diameter. Face densely punctate, shining. Clypeus 1.7× wider than long, with scattered punctures, apical margin rounded. MI 0.85. Genal carina reaching mandibular base.

Epicnemial carina low, with dentiform carina on transversal part. Speculum partly smooth. Propodeum densely and coarsely punctate, with complete apical transversal carina. Legs slender; hind femur 6.2× longer than wide. Hind metatarsus 0.75× as long as hind femur. 2 nd hind tarsomere 1.4× longer than 3 rd one. Hind claw with basal teeth, moderately bent apically. Areolet stalked; 2 nd recurrent vein in its middle. Nervulus postfurcal by 2× its width. Hairs on basal cell much as long as their intervals. Hind wing with 8 distal hamuli.

1 st tergite 2.4× longer than wide, with scattered punctures laterally. 2 nd tergite 1.3× longer than wide, with scattered punctures, shining. 3 rd tergite 1.3× longer than wide, with scattered superficial punctures.

Color: Black. Flagellum black. Head yellow; mandibular teeth, frons medially, stemmaticum and occiput black. Mesosoma mainly yellow; three stripes on mesoscutum, scuto-scutellar groove, ventral and posterior margins of pronotum, wide margins of mesopleuron, mesosternum, margins of metapleuron and two oblique paramedian stripes on propodeum black. Tergites black; 1 st to 6 th tergites with wide apical yellow bands. 1 st to 3 rd tergites with basal yellow bands. Fore and mid legs yellow. Hind coxa black, yellow dorsally; hind trochanter black; hind trochantellus yellow; hind femur black, with dorsal yellow stripe; hind tibia yellow, infuscate in apical 0.3; hind tarsomeres black, basally and apically shortly yellowish. Fore wing with weak apical brown spot; pterostigma brown.

R e m a r k: This ♂ with a complete apical propodeal carina probably belongs to a new species, but is not named here due to the unexact information of the location on the label and the unknown opposite sex. It resembles the ♀ of S. coreanus UCHIDA , but differs by the very scattered punctures of basal tergites (densely punctate in S. coreanus ). From the ♂ of S. longivalvator AUBERT , it can be differentiated by slenderer legs and the elongate basal tergites.