Celebarches unicus Heinrich, 1934

Riedel, Matthias, 2023, Contribution to the knowledge of the Ichneumoninae (Hymenoptera, Ichneumonidae) from Maritime Southeast Asia, Zootaxa 5363 (1), pp. 1-94 : 39

Celebarches unicus Heinrich, 1934 , new ♁

Material. Indonesia: SW Sulawesi, Gn. Bulusaraung, nr. Camba, Malawa, Mal. trap 1, c 750 m, 1 ♂ 7.ii.–28.iii.1995, Mal. trap 2, c 750 m, 3 ♂♂ 7.ii.–28.iii.1995, Mal. trap 3, c 750 m, 2 ♀♀ 4 ♂♂ 7.ii.–28.iii.1991 , 2 ♀♀ 7.ii.– 28.viii.1995, C. van Achterberg & Y. Yasir, c. 800 m, 1 ♀ 21.ii.–25.iii.1997, leg. C. van Achterberg; SE Sulawesi, nr Sanggona, Base camp, Gn. Watuwila, Mal. trap 12, c 200 m, 2 ♂♂ 19.x.–5.xi.1989, leg. C. van Achterberg ; C Sulawesi, nr Luwuk , Bunga, c 300 m, 1 ♀ 1–14.xi.1989 , 2 ♀♀ 21–31.x.1989, Mal. trap 16, leg. C. van Achterberg; N Sulawesi, Dumoga-Bone N.P. c 220 m, 0°34´N 123°54´E, Mal. trap: Maze Toraut R., 1 ♂♂ 1–9.xi.1985, C. van Achterberg (Leiden and coll. Riedel) .

Description. ♂. Body length 11–12 mm. Flagellum with 36 flagellomeres, bristle-shaped; 1 st flagellomere 4.0 × longer than wide. Tyloids absent. Mandible with one large tooth. Genal carina reaching mandibular base. Scutellum with lateral carina in basal half. Hind femur 4.1 × longer than wide. 2 nd tergite 1.2 × wider than long. Otherwise as described for the ♀ ( Heinrich 1934: 162–163).

Colour. Black. Rings on flagellomeres 8–15, palps, clypeus, face, large triangular spot of frontal orbit, wide frontal margin and spot of hind edge of pronotum, tegula, subtegular ridge, scutellum and postscutellum, 7 th tergite and parameres, fore and mid coxae and trochanters ivory. Mandible, propodeum and apical half of metapleuron red. 1 st to 3 rd tergites red; 4 th tergite red basally, black apically; 5 th and 6 th tergites black. Legs red; hind tarsus black. Wing with yellowish suffusion; pterostigma brown.

Remarks. The scutellum is usually not carinated, but one otherwise typical ♀ has a lateral carina in basal half of scutellum.

Distribution. Only known from Sulawesi.

Key to the known species of Celebarches Heinrich, 1934:

1. Tergites mainly black, basal tergites with or without yellowish or ivory bands or spots. 6 th and 7 th tergites ± ivory.......... 2

- At least 1 st and 2 nd tergites red, without ivory bands or spots. 6 th and 7 th tergites ± ivory............................... 5

2. Basal tergites with ivory or yellowish bands. Legs mainly red; hind tarsus mainly or entirely ivory. Propodeum with ivory spots. Face mainly or entirely ivory............................................................................. 3

- Basal tergites entirely black, without ivory coloration. Legs mainly black; hind tarsus black or ± ivory. Propodeum entirely black. Face black, only frontal orbits with ivory stripes........................................................ 4

3. All tergites with apical ivory bands (fig. 14C). Face ivory, with central M-shaped black spot. Hind tarsus entirely ivory. Malaysia................................................................. Celebarches sabahensis nov. sp. ♀

- 1 st to 3 rd tergites partly yellowish, 4 th and 5 th tergites entirely black. Face completely ivory. Hind tarsus ivory except black metatarsus. India..................................................... Celebarches albitarsis ( Cameron, 1903) ♂

4. Spots on collar, scutellum and postscutellum ivory. Hind tarsus black. Japan......... Celebarches futjitae (Uchida, 1956) ♀

- Mesosoma except ivory tips of apophyses black (fig. 13C). Hind tarsus except black basal 2/3 of metatarsus ivory. Borneo.............................................................................. Celebarches nigritor nov. sp. ♀

5. Propodeum black (fig. 12C). 1 st and 2 nd tergites red, following tergites black. Hind femur brown or blackish; 4 th and 5 th hind tarsomeres ivory. Borneo....................................................... Celebarches albifrons nov. sp. ♂

- Propodeum red. 1 st to 3 rd or all tergites red. Hind femur red; hind tarsus red or blackish, without ivory coloration.......... 6

6. All tergites red. Face ivory. Hind tarsus ± infuscate. Sulawesi ................... Celebarches unicus Heinrich, 1934 ♀ ♂

- 1 st to 3 rd tergites red, following tergites black, 7 th tergite ivory (fig. 15D). Face black. Hind tarsus red. Sulawesi ...................................................................................... Celebarches tricolor nov. sp. ♀