Syzeuctus heluanensis SCHMIEDEKNECHT , 1900

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 : 1043-1044

Syzeuctus heluanensis SCHMIEDEKNECHT, 1900

O r i g i n a l: Syzeuctus heluanensis SCHMIEDEKNECHT, 1900: 345

P a r a l e c t o t y p e: (♀) "F, Wadis E Heluan, 1897" (Rudolstadt), studied.

The lectotype (see OEHLKE & TOWNES 1969: 400) was not found in Berlin and is probably lost.

S t u d i e d m a t e r i a l: 1♀; Egypt.

D e s c r i p t i o n: ♀: Body length 9 mm. Antenna with 31 flagellomeres; 1 st flagellomere 5.0× longer than wide and 0.56× as long as eye; preapical flagellomere 1.2× longer than wide. Temple parallel behind eye and slightly and roundly narrowed apically, dorsally 0.5× as wide as eye. OED 1.5× and OOD 2.0× ocellar diameter. Frons with scattered punctures, moderately swollen laterally and moderately impressed medially. Clypeus slightly convex, almost smooth, c. 2× wider than long. Lower mandibular tooth smaller than upper one. MI 0.6. Genal carina reaching mandibular base.

Mesosoma 1.4× longer than high. Frontoventral edge of pronotum strongly curved, lateral pronotal groove smooth ventrally. Epicnemial carina low, with low lamella at transversal part. Speculum partly smooth. Apical transversal carina of propodeum entirely absent. Hind femur 5.0× longer than wide. Hind metatarsus 0.65× as long as hind femur. 2 nd hind tarsomere 1.25× longer than 3 rd one. Hind claw densely pectinate, moderately bent apically. Areolet stalked; 2 nd recurrent vein in its middle. Nervulus postfurcal by 1× its width. Hairs of basal cell much shorter than their intervals. Hind wing with 9 distal hamuli.

1 st tergite 1.6× longer than wide, with scattered punctures. 2 nd tergite 1.2× wider than long, with dense punctures. 3 rd tergite 1.2× wider than long, with rather dense punctures. Ovipositor 1.0× as long as fore wing, 1.38× longer than metasoma and 2.6× longer than hind tibia.

Color: Head and mesosoma mainly yellow. Flagellum reddish-yellow. Median stripe on frons, stripes between ocelli, occiput, pedicel and 1 st flagellomere, three stripes on mesoscutum, large dorso-caudal spot on mesopleuron, metapleuron except yellow caudal spot and sides of propodeum blackish. 1 st tergite yellow, with triangular blackish spot centrally; 2 nd to 4 th tergites reddish, with wide apical yellow bands; 5 th to 7 th tergites brown, with yellow apical bands. Legs including coxae and trochanters yellow; trochanters, femora and tibiae with dorsal brownish stripes. Fore wing with weak subapical brown spot; pterostigma brownish, yellow proximally.

♂ and hosts unknown.