Celebarches albifrons, Riedel, 2023

Riedel, Matthias, 2023, Contribution to the knowledge of the Ichneumoninae (Hymenoptera, Ichneumonidae) from Maritime Southeast Asia, Zootaxa 5363 (1), pp. 1-94 : 33-34

Celebarches albifrons nov. sp.

( Figs 12 A–C )

Holotype. (♂) Malaysia: SW Sabah, nr. Long Pa Sia (West), 25.xi. –8.xii.1987, c. 1020 m, Mal. trap 2, C. van Achterberg, RMNH´87 (Leiden).

Paratypes. (2 ♂♂) similar labels (Leiden and coll. Riedel).

Etymology. The species name refers to the largely ivory frons.

Description. ♂. Body length 11 mm.

Head. Flagellum with 36–38 flagellomeres, very slender and bristle-shaped; 1 st flagellomere 3.8 × longer than wide. Tyloids absent. Temple moderately and roundly narrowed behind eye (fig. 12B). OED 1.4 × and OOD 0.9 × ocellar diameter. Frons with sparse punctures, shining. Face and clypeus densely punctate. Clypeus large, almost flat; apical margin sharp, almost straight (fig. 12A). Mandible sickle-shaped, ventral tooth absent. Malar space 0.6 × as long as width of mandibular base. Gena densely punctate. Genal carina reaching mandibular base.

Mesosoma . Notaulus impressed in frontal 1/3 of mesoscutum.Mesoscutum densely punctate, ± dull.Mesopleuron dense punctures and some striae posteriorly, speculum large and smooth. Metapleuron rugose-punctate; juxtacoxal carina present. Scutellum pyramidal, slightly longer than wide, densely rugose-punctate, lateral carina strong in basal 0.7–0.8. Propodeum completely carinated, rugose, with short tooth-like apophysis (fig. 12C); spiracle slit-shaped. Area basalis wider than long. Area superomedia 1.3 × wider than long; costula reaching its middle. Hind coxa with fine dense punctures. Hind femur 4.5 × longer than wide. Claws simple. Areolet almost pointed frontally. Vein 1cu-a slightly antefurcal, interstitial or slightly postfurcal.

Metasoma. Postpetiole slightly widened, without latero-median carina; median field not separated, finely rugose. 2 nd tergite 1.1 × wider than long. Gastrocoelus slightly impressed, with fine ridges. Thyridium indistinct, 0.3 × as wide as the interval between thyridia. 2 nd and 3 rd tergites finely and densely rugose-punctate, dull; following tergites with superficial punctures, ± shining. Hypopygium unmodified; apical margin straight.

Colour. Black. Ivory are dorsal stripes on flagellomeres 7–14/15, palps, mandible basally, spot of gena, clypeus and face, frons except black median stripe, scape ventrally, collar and upper margin of pronotum, tegula mainly, subtegular ridge, apical 2/3 of scutellum and postscutellum, usually narrow apical margin of 6 th tergite, entire 7 tergite, hypopygium and paramere. 1 st and 2 nd tergites reddish-yellow. Coxae black, fore and mid coxae with ivory spots; fore and mid trochanters ivory; fore and mid femora and tibiae reddish-yellow; fore tarsus distally and mid tarsus entirely black; hind trochanter and femur brown or black; hind tibia yellowish, black in basal 0.1 and apical 0.2–0.3; hind tarsus black, 4 th and 5 th hind tarsomeres ivory. Wings slightly yellowish; pterostigma brown.

♀ unknown.

Distribution. Only known from Borneo.

Figures

FIGURE 12. Celebarches albifrons n. sp. HT ♂. A face, frontal view, B head, dorsal view, C propodeum, dorsal view.