Key to species of Gauldiana

1. Clypeus subtriangular, with lower lateral margin conspicuously concave (Fig. 105). Mandible distinctly twisted. Female with first tergite rather strongly depressed, transversely oval in cross-section. Antenna entirely orange; flagellum weakly clavate, with about 19–21 flagellomeres, and the subapical flagellomere transverse (Fig. 104). Head black with yellowish clypeus and orange marks near base of mandible (Figs 105, 106); mesosoma orange with three black marks on mesoscutum (Figs 37, 106); metasoma behind first tergite brownish yellow (Figs 37, 109). Relatively large with body length about 5.0 mm and fore wing length 3.8–4.1 mm .................................................................... G. triangulata sp. nov.

- Clypeus lenticular (Figs 89, 94). Mandible not twisted. First tergite more or less round in cross-section. Antenna entirely black, or pale basally and gradually darkening towards apex; flagellum filiform or clavate, usually with lesser number of flagellomeres (Figs 88, 95, 99–101). Mesoscutum either orange or black, without clearly defined black anteromedian and lateral marks. Head orange to black. Small to medium-sized with body length 2.3–3.5 mm and fore wing length 2.1–3.0 mm............ 2

2. Mesosoma more or less entirely orange, sometimes with a weak reddish brown marking (Figs 29, 34). Fore wing with vein 2mcu interstitial or slightly postfurcal (Fig. 19). Ovipositor weakly upcurved in basal 0.8 and strongly upcurved apically (Figs 29, 34)................................................................................................. 3

- Mesosoma dark reddish brown to black, sometimes with reddish orange markings on pronotum, mesoscutum and mesopleuron (Figs 30–33, 35, 36). Fore wing with vein 2m-cu interstitial to distinctly postfurcal. Ovipositor evenly upcurved over its entire length or strongly upcurved apically....................................................................... 4

3. Head black with only clypeus yellow and lower face sometimes slightly paler. Mesosoma uniformly orange (Fig. 34). Legs yellow (Fig. 34). Flagellum filiform, with 19 flagellomeres (Fig. 34). Ovipositor sheath 1.3× as long as hind tibia................................................................................................. G. nigra sp. nov.

- Head with at least lower face and genae orange or orange-brown, usually entire eye orbits orange (Fig. 29). Mesosoma orange with reddish brown markings (Fig. 29). Legs yellow but hind coxa usually darkened. Flagellum slightly clavate apically, with 16–17 flagellomeres (Fig. 88). Ovipositor sheath about twice as long as hind tibia.................... G. arantia sp. nov.

4. Antenna dark brown or black, flagellum short, distinctly clavate, with 13–14 flagellomeres (Fig. 101). Ovipositor strongly and evenly upcurved in apical half, its sheath about as long as hind tibia (Fig. 103). Malar space short, 0.4–0.5× basal mandibular width (Fig. 101)......................................................................... G. minuta sp. nov.

- Antenna sometimes pale basally, flagellum longer, filiform or clavate, with 15–19 flagellomeres (Figs 95, 99, 100). Ovipositor weakly upcurved, sometimes with apex strongly upcurved, its sheath usually much longer than hind tibia. Malar space usually>0.5× basal mandibular width............................................................................ 5

5. Metasoma behind first tergite brown (Fig. 32). Fore wing with pterostigma pale brown (Fig. 32). Antenna uniformly brown or black (Fig. 100). Ovipositor sheath 1.7–1.85× as long as hind tibia................................ G. kaweka sp. nov.

- Metasoma dark brown to black. Fore wing with pterostigma brown to dark brown (Figs 30, 31, 35). Antenna black, or pale basally and darkening towards apex. Ovipositor length varied.................................................. 6

6. Basal part of propodeum longer than the apical area. Flagellum with 19 flagellomeres (Fig. 36). Ovipositor short, its sheath 0.7–0.85× as long as hind tibia (Fig. 36). Malar space half as long as basal mandibular width............ G. rotoitia sp. nov.

- Basal part of propodeum equal to or shorter than the apical area. Flagellum with 16–18 flagellomeres. Ovipositor 1.0–2.0× as long as hind tibia. Malar space sometimes longer than basal mandibular width..................................... 7

7. Ovipositor sheath 1.7–2.0× as long as hind tibia (Fig. 97)...................................... G. aspiringa sp. nov.

- Ovipositor sheath 1.0–1.4× as long as hind tibia (Figs 31, 35)................................................... 8

8. Fore wing with vein R1 ending far short of apex. Mesosoma uniformly dark brown or black (Fig. 31). Ovipositor sheath 1.0– 1.3× as long as hind tibia................................................................... G. dubia sp. nov.

- Fore wing with vein R1 almost reaching apex (Fig. 35). Mesosoma with profusion of orange markings on pronotum, mesoscutum and mesopleuron (Fig. 35). Ovipositor sheath 1.4× as long as hind tibia......... G. postfurcalis (Khalaim), comb. nov.