Syzeuctus ceballosi SEYRIG , 1926

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 : 1031-1032

Syzeuctus ceballosi SEYRIG, 1926 (Figs 63, 106)

O r i g i n a l: Syzeuctus ceballosi SEYRIG, 1926: 129

L e c t o t y p e: (♀) "Aranjuez, 14-VI-1903, G. Mercet" (MNCN), type not studied.

S t u d i e d m a t e r i a l: 3♀♀, 3♂♂; Spain.

D e s c r i p t i o n: ♀:Body length 10.5-12 mm. Antenna with 37-38 flagellomeres; 1 st flagellomere 4.6× longer than wide and 0.6× as long as eye; preapical flagellomere c. 1.2× longer than wide. Temple shortly parallel behind eye, strongly and roundly narrowed apically, dorsally c. 0.4× as long as eye. OED 1.3-1.5× ocellar diameter. Frons coarsely punctate, moderately swollen laterally, strongly impressed medially. Clypeus 1.6× wider than long, slightly convex, with scattered punctures, apical margin rounded. MI 0.75-0.8. Genal carina low, reaching hypostomal carina at mandibular base.

Mesosoma 1.4× longer than high. Lateral pronotal groove smooth. Speculum partly smooth. Epicnemial carina moderately elevated, with dentiform lamella on transversal part. Apical transversal carina of propodeum present laterally, absent medially. Hind femur 6.0-6.2× longer than wide. Hind metatarsus 0.7× as long as hind femur. 2 nd hind tarsomere 1.5× longer than 3 rd one. Hind claw completely pectinate, moderately curved at apex. Areolet stalked; 2 nd recurrent vein distal to its middle. Nervulus postfurcal by 2- 3× its width. Hairs on basal cell slightly shorter than their intervals.

1 st tergite 1.6-1.7× longer than wide, with very scattered setiferous punctures; spiracle not protruding. 2 nd tergite 1.0-1.05× longer than wide, with rather dense punctures. 3 rd tergite 1.0-1.1× longer than wide, with dense punctures. Ovipositor 1.0-1.15× as long as fore wing, 1.15-1.3× longer than metasoma and 2.5-2.8× longer than hind tibia.

Color: Black. Antenna reddish-brown, black basally. Head black; base of mandible, clypeus and wide orbits entirely, and sometimes spot on face yellow. Mesosoma mainly yellow; three stripes on mesoscutum, scuto-scutellar groove, band on collare, ventral and posterior margins of pronotum and mesopleuron, entire mesosternum, margins (except posterior one) of metapleuron and two oblique paramedian stripes on propodeum black. Tergites black; 1 st to 3 rd tergites with yellow basal bands and 1 st to 4 th /5 th tergites with wide apical yellow bands. All coxae and hind trochanter and trochantellus mainly black; fore and mid legs otherwise yellow; hind femur reddish; hind tibia and tarsus yellow-red.

Fore wing hyaline, with brown apical band; pterostigma brown. ♂: Body length 12-14 mm. Antenna with 38-39 flagellomeres; 1st flagellomere 4.0×

longer than wide and 0.6× as long as eye. Temple shortly parallel behind eye, moderately narrowed apically. OED 1.6× ocellar diameter. Clypeus 1.7-2× wider than long. MI 0.8- 0.9. Genal carina reaching mandibular base. Lateral pronotal groove smooth. Speculum partly smooth. Epicnemial carina with dentiform lamella on transversal part. Apical carina of propodeum present laterally, absent medially. Hind femur 5.0-5.3× longer than wide. Hind metatarsus 0.7× as long as hind femur. 2 nd hind tarsomere 1.5× longer than 3 rd one. Hind claw with short teeth. Areolet stalked; 2 nd recurrent vein distal to its middle. Nervulus postfurcal by 2-3× its width.

1 st tergite 1.55-1.9× longer than wide, with scattered punctures. 2 nd tergite 1.15× longer than wide to 1.1× wider than long, with scattered or rather dense punctures. 3 rd tergite 1.1× longer than wide to 1.25× wider than long, with dense fine punctures.

Color: Antenna reddish, blackish basally. Spot on mandible, clypeus, wide orbits and spots on face yellow. Mesosoma with rich yellow coloration. Metasoma black; 1 st and 2 nd /3 rd tergites with yellow basal bands. 1 st to 5 th tergites with wide yellow apical bands. Coxae and trochanters black, fore coxa and fore and mid trochanters with yellow stripes; hind trochantellus black, yellow apically. Legs mainly yellow; hind femur reddish, yellow apically; hind tibia yellow externally, red internally. Mid and hind tarsi brown distally. Wings with brown apical stripes. Pterostigma brown, yellow proximally.

Host: Eublemma respersa HÜBNER, 1829 (Lep. Erebidae ) (Edinburgh).