Key to female Aulacidae of New Caledonia (modified from Jennings et al. 2004 for species of Aulacus Jurine, 1807) 1. Tarsal claws simple or with a small inner tooth................................................................................ 2 – Tarsal claws pectinate....................................................................................................................... 5 2. Hind wing venation reduced, R +Rs, M+ Cu, Cu, r-m and 2-M absent (Jennings et al. 2004: fig. 1)................................................................................................................................................. 3 – Hind wing venation not reduced, R+Rs, M +Cu, Cu, r-m and 2-M present, although spectral (Jennings et al. 2004: fig. 2).......................... Aulacus coracinus Jennings, Austin & Stevens, 2004 3. Hind coxa with a distinct lobe on inner distal surface, extending posteriorly for a distance equal to about one third of the length of trochanter; ovipositor on posterior surface of hind coxa, guide longitudinal and backward-pointing, extending to tip of hind coxal lobe (Jennings et al. 2004: fig. 10)................................................................ Aulacus emineo Jennings, Austin & Stevens, 2004 – Hind coxa without a distinct lobe on inner distal surface; ovipositor guide on inner surface of hind coxa (Jennings et al. 2004: fig. 9)..................................................................................................... 4 4. Mesosoma (with the exception of the pronotum) and metasoma black (Fig. 1A); fore wing with vein 2-Rs+M shorter than 2-Rs, discal cell elongated and narrow; metasoma 1.10 × as long as mesosoma; smaller species (3.18 mm)......................................................... Aulacus pascali sp. nov. – Mesosoma and metasoma black with extensive orange coloration (Fig. 2); fore wing with vein 2-Rs+ M as long as 2-Rs, discal cell not elongated; metasoma 1.28 × as long as mesosoma; bigger species (4.1–5.9 mm)....................................... Aulacus burwelli Jennings, Austin & Stevens, 2004 5. Mostly light orange species (Figs 3–4). Head 1.35 × as wide as long; antenna with scape 1.58 × as long as pedicel. Mesosoma stouter; dorsal face of propodeum strongly concave basally; presence of a single transversal ridge on dorsal posterior half of propodeum (Fig. 4); OI index superior to 88............................................................................................................ Pristaulacus elveni sp. nov. – Mostly black species (Fig. 5). Head 1.20 × as wide as long; antenna with scape 2 × as long as pedicel. Mesosoma more elongate; dorsal face of propodeum shallowly concave basally; presence of several transversal ridges on dorsal posterior half of propodeum (Fig. 5); OI index inferior to 86.................................................................................................. Pristaulacus villemantae sp. nov.

Published as part of Ramage, Thibault & Jouault, Corentin, 2020, New species and records of Evanioidea and Stephanoidea from New Caledonia (Hymenoptera), pp. 1-32 in European Journal of Taxonomy 723 on page 15, DOI: 10.5852/ejt.2020.723.1141, http://zenodo.org/record/4249813