Syzeuctus spec. 2

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 : 1076-1077

Syzeuctus spec. 2

M a t e r i a l: (♂) " Mongolia, Cojbalsan aimak, 15 km N von Somon Galuut, 850 m, Exp. Dr. Kabzab, 1965 - Nr. 433, 17.VIII.1965 " (Budapest).

D e s c r i p t i o n: Body length 10 mm. Antenna with 41 flagellomere; 1 st

flagellomere 4.1× longer than wide and 0.63× as long as eye. Temple less strongly narrowed. OED 1.8-1.9× and OOD 2.3× ocellar diameter. MI 0.7-0.8. Hairs on head and mesosoma shorter. Hind femur 5.2× longer than wide. Hind metatarsus 0.75× as long as hind femur. 2 nd hind tarsomere 1.4× longer than 3 rd one. Areolet stalked; 2 nd recurrent vein in or distal to its middle. Nervulus postfurcal by 2× its width. Hairs on basal cell longer than their intervals. Hind wing with 9-10 distal hamuli.

1 st tergite 1.75× longer than wide, rather densely punctate. 2 nd tergite 1.1× longer than wide, densely punctate; 3 rd tergite 1.0× as long as wide, with dense superfical punctures.

Color: Black. Palps, face and antenna black. Apical clypeus, malar space, mandible, complete orbits yellow. Mesosoma black; hook-shaped spot on mesoscutum, tegula, subtegular ridge, two small spots on mesopleuron, spot on metapleuron, and anterolateral spots on scutellum yellow. 1 st tergite apically, 2 nd and 3 rd tergites completely and 4 th tergite basally red. Coxae and trochanters black, frontal spots on fore and mid coxae and trochanters and all trochantelli yellow. Fore and mid femora, tibiae and tarsi yellow frontally, reddish dorsally; hind femur black, yellow apically; hind tibia yellow, infuscate in apical 0.2; hind tarsus blackish in apical 2/3. Pterostigma blackish, yellow proximally.

R e m a r k: This species belongs to the petiolaris -group but differs from the ♂♂ of S. petiolaris (GRAVENHORST) and S. hyalinipennis SZÉPLIGETI by the more extended yellow color pattern on the mesosoma. As mentioned above (see remark under S. hyalinipennis ), more material from Central and Eastern Asia will be necessary to solve the taxonomy of the East Palaearctic members of the petiolaris -species group.