Eccoptosage quadridentata (Cameron, 1905)

Riedel, Matthias, 2023, Contribution to the knowledge of the Ichneumoninae (Hymenoptera, Ichneumonidae) from Maritime Southeast Asia, Zootaxa 5363 (1), pp. 1-94 : 53

Eccoptosage quadridentata (Cameron, 1905) , new ♁

( Figs 22A–C )

Material. Malaysia: SE Sabah, nr. Danum Valley Field C, c 150 m, Mal. trap 4, over rivelet, 1 ♀ 20–22.xi.1987, Mal. trap 10, 1 ♂ 20–22.iii.1987, leg. C. van Achterberg (Leiden) .

Description. ♀. Body length 16 mm. Flagellum with 43 flagellomeres, slightly lanceolate; 1 st flagellomere 4.3 × longer than wide, 13 th flagellomere square, widest flagellomeres 1.3 × wider than wide. OED 1.6 × and OOD 0.6 × ocellar diameter. Mesoscutum finely rugose-punctate, dull. Pronotum, mesopleuron and metapleuron striate. Hind femur 5.4 × longer than wide. 2 nd tergite 1.1 × wider than long. Thyridium small, oval, 0.3 × as wide as the interval between thyridia.

Colour. Flagellum black, without ivory ring. Tegula ivory. Hind femur red, black in apical 0.3, apex with small yellowish spot. 1 st to 3 rd tergites red, 3 rd tergite infuscate in apical 0.3. Petiole mainly and hind margins of all tergites with narrow ivory bands. Colour otherwise as described by Cameron (1905: 154–155).

♂: Body length 14 mm.

Head. Flagellum with 42 flagellomeres, slender and bristle-shaped; 1 st flagellomere 3.5 × longer than wide. Tyloids on flagellomeres 10–14, long-oval, maximally 0.7 × as long as their flagellomeres. Temple rather short, moderately and roundly narrowed behind eye. OED 1.3 × and OOD 0.6 × ocellar diameter. Frons with microsculpture, ± shining. Face and clypeus densely punctate. Clypeus large, flat; apical margin sharp, slightly rounded (fig. 22A). Mandible sickle-shaped, ventral tooth small and strongly turned inwards. Malar space 0.5 × as long as width of mandibular base. Genal carina reaching mandibular base.

Mesosoma . Mesoscutum finely punctate, dull. Mesopleuron densely punctate, ventrally partly rugose-punctate; speculum with fine punctures. Metapleuron punctate and ± striate. Scutellum pyramidal, with strong lateral carina forming a distinct denticular spine apically. Propodeum with strong apophysis (fig. 22B). Area superomedia hexagonal, 1.3 × longer than wide; costula reaching its basal 0.3. Hind femur 5.1 × longer than wide. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 3.0 × their width. Vein 1cu-a postfurcal by 3.0 × its width.

Metasoma. Postpetiole moderately widened, almost smooth centrally and finely punctate laterally and apically. 2 nd tergite 1.1 × wider than long. Gastrocoelus slightly impressed, smooth. Thyridium small, 0.3 × as wide as interval between thyridia (fig. 22C). 2 nd and 3 rd tergites finely and densely punctate; following tergites with superficial punctures. Hypopygium unmodified, apical margin straight.

Colour. Black. Flagellum black, brownish ventrally. Ivory are palps, mandible except teeth, clypeus, face, wide frontal orbit, gena up to vertex, scape ventrally, frontal margin and apical half of upper margin of pronotum, spot of tegula, subtegular ridge, spot of ventral mesopleuron, apical tip of lateral carina of scutellum, postscutellum, apophysis, apical spot of postpetiole and apical margins of 2 nd to 5 th tergites. 1 st to 3 rd tergites reddish. Legs black; fore and mid coxae and trochanters and frontal stripes on fore and mid femora, tibiae and tarsi ivory; hind coxa black, red dorsally; hind femur red dorsally, black ventrally, with ivory spot apically; hind tibia black, with ivory stripe externally; hind tarsus black. Fore wing distinctly infuscate, somewhat paler basally; pterostigma black.

Distribution. Only known from Borneo.

Figures

FIGURE 22. Eccoptosage quadridentata (Cameron, 1905) ♂. A face, frontal view, B propodeum, dorsal view, C basal tergites, dorsal view.