Arpactophilus numee sp. nov.

(Figs. 11, 79-80)

Diagnosis. Arpactophilus numee is the only New Caledonian species in the genus with the combination of a distinctly elevated ridge on the midventral line (Fig. 11) and a yellow metatibia without a well-delimited brown or black apical area.

Description. FEMALE: Total length 5.6 mm; forewing length 3.5 mm.

Body black, with areas of dark yellow and brown. Dark yellow: palpi; front of scape; pedicel; trochanters; femora apically and basally; tibiae; tarsi. Brown: posterior of scape; flagellum; anterior pronotal margin; tegula; coxae; most of femora. Mandible reddish-black apically. Wings hyaline; pterostigma dark brown.

Head about 1.1 × as long as wide in frontal view. Apical margin of clypeus strongly projecting medially, without teeth or lobes, medioapical margin straight (Fig. 79). Apical margin of labrum strongly projecting medially, without teeth or lobes, nearly margin straight. Ventral mandibular tooth about ¼–1/5 of total mandibular length, not reaching opposite mandibular base. Palpal formula 4:3. Frons colliculate and finely reticulate with a carina parallel to inner compound eye margin (Fig. 79) and dense short setae. Frontal carina present from median ocellus to midlength of clypeus, forming a small flat point at basal clypeal margin. Scape 3.7 × as long as wide.

Ocellar triangle anterior of tangent between upper posterior orbits of compound eyes, lateral ocelli anterior of tangent by approximately their diameter. Occipital carina interrupted dorsally (Fig. 6). Gena imbricate with sparse punctation and long setae, without tubercles, spines, or dorsoventral carina. Hypostomal midventral line carinate, faint anteriorly, strongly angulate medially (Fig. 11).

Mesosoma about 1.8 × as long as wide in dorsal view. Propodeum about 0.9 × as long as wide in dorsal view. Mesosoma imbricate with dense punctation (Fig. 80), except dorsal surface of propodeum; lateral surface of propodeum also transversely carinulate; dorsal surface of propodeum coarsely reticulate (similar to pattern in Fig. 18). Pitted sulcus present posterior to mesoscuto-mesoscutellar sulcus. Hypersternal sulcus barely visible as impression close to omaulus. Metafemur 2.8 × as long as wide. Metatibia without differently colored area apically, but surface slightly swollen apically. Pretarsal claws without teeth. Forewing with two submarginal cells; anterior border of submarginal cell II slightly shorter than posterior border. Hind wing with five distal hamuli.

Metasoma polished, punctation sparse (Fig. 80). Metasomal sternum II swollen medially, forming bulge (as in Fig. 2). Pygidium with broad row of silk setae.

MALE: Unknown

Remarks. Arpactophilus numee is similar to A. kumak, A. vamale, A. nyelayu, A. xaragure, A. orowe, A. pwapwa, and A. arboreus as all share the combination of a dark brown or black metasoma with a bulge on the metasomal sternum II and a dark brown or black clypeus with a medially strongly projecting apical margin that has no or only a small incision medially. See remarks-section of A. kumak .

Material examined. HOLOTYPE ♀: “ NEW CALEDONIA 9966: 21°45’S x 166°00’E, 1000m, Mt Do summit. 27 Sep–21 Nov 2000. J Skevington & C Burwell. Malaise” [QM].

Etymology. The specific epithet is taken from the name Numèè, one of the New Caledonian native languages. It is treated as a noun in apposition.