Benyllus satageus ( Tosquinet, 1903 )

Riedel, Matthias, 2023, Contribution to the knowledge of the Ichneumoninae (Hymenoptera, Ichneumonidae) from Maritime Southeast Asia, Zootaxa 5363 (1), pp. 1-94 : 30-31

Benyllus satageus ( Tosquinet, 1903)

Material. Indonesia: W Java, Gunung Botol , 6.729°S 106.491°E, 1490 m, 2 ♂♂ 24.iv.2016, leg. X. Mengal & T . Burton ( ZSM); Indonesia: W Bali, nr Negara, rainforest above Batuagung , c 575 m, 1 ♂ 4–13.xii.1991, Mal. trap 1, leg. C. van Achterberg (Leiden) .

Description. ♂ (from Bali). Body length 8.5 mm.

Head. Flagellum with 36 flagellomeres; 1 st flagellomere 3.6 × longer than wide. Tyloids on flagellomeres 11– 19, long-oval, maximally 0.8 × as long as their flagellomeres. Temple very short, strongly and linearly narrowed behind eye, dorsally 0.1 × as long as eye. OED 0.9 × and OOD 1.3 × ocellar diameter. Frons densely punctate, ± dull. Face densely punctate, shining. Clypeus with dense punctures, impressed around anterior tentorial pit; apical margin sharp and slightly concave. Mandible long and distinctly narrowed behind base, with two teeth, lower tooth smaller. Malar space 1.2 × as long as width of mandibular base. Gena with fine punctures. Genal carina reaching hypostomal carina away from mandibular base.

Mesosoma . Notaulus indistinctly impressed frontally. Mesoscutum densely punctate, dull. Ventral half of mesopleuron densely rugose-punctate, with dense superficial punctures dorsally; speculum smooth. Metapleuron densely rugose-punctate; juxtacoxal carina present. Scutellum moderately elevated, slightly longer than wide, densely punctate and with complete lateral and apical carina. Propodeum completely carinated, with distinct apophysis; spiracle slit-shaped. Area basalis with median tubercle. Area superomedia heart-shaped, 1.4 × wider than long; costula reaching at apical 0.8 of its length. Hind coxa with dense punctures. Hind femur 4.6 × longer than wide. Claws simple.Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 3.0 × their diameter; vein 2m-cu slightly distad its middle. Vein 1cu-a interstitial.

Metasoma. Postpetiole moderately widened, without latero-median carina, densely punctate but with reduced punctuation medially; median field not separated. Gastrocoelus small, much longer than wide. Thyridium indistinct. 2 nd tergite 1.1 × wider than long, densely punctate, dull. 3 rd tergite densely punctate, but ± shining. Following tergites with superficial punctures, shining. Hypopygium unmodified, apical margin straight.

Colour. Black. Flagellum black, with ivory ring of flagellomeres 10–16; tyloids yellowish. Ivory are palps, mandible except teeth, clypeus and face except median brown stripe, frontal orbit up to vertex, ventral spot of scape, frontal margin and hind half of upper margin of pronotum, tegula, subtegular ridge, large spot of ventral mesopleuron, apical 2/3 of scutellum, posterolateral stripe of propodeum around apophysis, posterolateral spots of 1 st to 3 rd tergites, narrow apical margins of 2 nd to 5 th tergites, large median spots of 6 th and 7 th tergites and parameres. Legs reddish; fore and mid coxae ivory; hind coxa brownish dorsally; hind femur red, diffusely infuscate in apical third; hind tibia black, with ochreous basal spot; mid and hind tarsi ivory, with brown distal tarsomeres. Wings slightly infuscate; pterostigma black.

Distribution. Known from Java, new record for Bali.