Syzeuctus caper (SEYRIG, 1927)

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 : 1028-1029

Syzeuctus caper (SEYRIG, 1927) (Figs 28, 61, 104)

O r i g i n a l: Diceratops caper SEYRIG, 1927

L e c t o t y p e: (♀) "Espiel (Sierra Morena), 30-V-26 Seyrig" (Madrid), type not studied.

S t u d i e d m a t e r i a l: 5♀♀, 2♂♂, Spain.

D e s c r i p t i o n: ♀: Body length 8-9 mm. Antenna with 33 flagellomeres; 1 st flagellomere 4.5× longer than wide and 0.63× as long as eye; preapical flagellomere 1.3- 1.4× longer than wide. Temple strongly and roundly narrowed behind eye, dorsally 0.35× as long as eye. Stemmaticum moderately elevated. OED 1.5× ocellar diameter. Frons slightly impressed medially, with a pair of sublateral tooth-shaped horns, with scattered punctures. Face densely punctate, centrally protruding, inner eye margins parallel. Clypeus 1.6× wider than long, moderately convex, with scattered punctures, apical margin rounded. MI 0.8-0.9. Genal carina reaching mandibular base.

Mesosoma densely punctate, 1.4-1.45× longer than high. Lateral pronotal groove ± rugose. Speculum with scattered punctures. Epicnemial carina slightly elevated, with low carina on transversal part. Apical transversal carina of propodeum complete. Hind femur 4.8-5.1× longer than wide. Hind metatarsus 0.65× as long as hind femur. 2 nd hind tarsomere 1.35× longer than 3 rd one. Hind claw with long teeth, moderately curved apically. Areolet stalked; 2 nd recurrent vein in or slightly distal to its middle. Nervulus postfurcal by 1× its width. Hairs on basal cell longer than their intervals.

Metasoma stout; 1 st tergite 1.3-1.4× longer than wide, with very scattered punctures, strongly shining. 2 nd tergite 1.25-1.3× wider than long, with rather dense punctures. 3 rd tergite 1.25-1.3× wider than long, densely but often superficially punctate. 1 st tergite not distinctly widened basally. Spiracles on 1 st to 3 rd tergites slightly protruding laterally. Ovipositor 0.85-0.9× as long as fore wing, 1.1-1.2× longer than metasoma and 1.9-2.3× longer than hind tibia.

Color: Black. Antenna brown to black. Clypeus reddish or yellowish apically. Inner orbit up to vertex and outer orbit with narrow yellow stripes. Mesosoma black. 1 st to 4 th tergites red; 1 st tergite basally and 4 th tergite in apical half black; following tergites black. Coxae and trochanters black; legs otherwise reddish; hind tibia yellowish basally, infuscate in apical 0.5-0.7; hind tarsus blackish, sometimes hind metatarsus with yellow stripe. Wings slightly infuscate, without apical spot; pterostigma brownish-red.

♂: Body length 9 mm. Antenna with 35-37 flagellomeres; 1 st flagellomere 4.2× longer than wide and 0.6× as long as eye. Temple moderately and roundly narrowed behind eye. OED 1.6× ocellar diameter. Clypeus 1.7× wider than long. MI 0.9-1.0. Lateral pronotal groove rugose and punctate. Apical transversal carina of propodeum sometimes obsolete medially. Hind femur 4.5-4.7× longer than wide. Hind metatarsus 0.75× as long as hind femur. 2 nd hind tarsomere 1.3-1.4× longer than 3 rd one.

1 st tergite 1.5-1.65× longer than wide, with very scattered punctures. 2 nd tergite 1.1-1.15× wider than long, with rather dense punctures. 3 rd tergite 1.05-1.1× wider than long.

Color: Black. Antenna reddish, darkened basally and sometimes apically. Mandible except teeth, clypeus, sometimes stripes on face, inner and outer orbits, sometimes spot on tegula, spot on fore coxa and fore and mid trochanters yellow. 2 nd to 4 th tergites red, 4 th tergite sometimes black apically; 1 st tergite black, apically ± red.

Hosts unknown.