Key to species of Barycnellus

1. Fore wing with 2m-cu vein postfurcal (Fig. 14). Head, in dorsal view, weakly transverse (Fig. 67). Antennae entirely orangebrown or brown, with 21–23 flagellomeres (Fig. 65). Ovipositor very short, with apex very thin and strongly upcurved (Fig. 68), its sheath about 0.35× as long as hind tibia............................................. B. cuvierensis sp. nov.

- Fore wing with 2m-cu vein antefurcal or interstitial, sometimes vein is virtually absent (Fig. 12, 13, 15, 16). Head, in dorsal view, strongly transverse. Antennae dark brown or blackish, with 14–22 flagellomeres. Ovipositor weakly upcurved to almost straight (Figs 64, 75, 81), its sheath 1.5–1.6× longer than hind tibia.............................................. 2

2. Head, in lateral view, with antennae inserted well below level of centre of head, and eyes strongly displaced ventrally (Figs 63, 78). Flagellum short and thick, usually slightly clavate, with 14–18 flagellomeres (Figs 61, 79). Hind leg robust, with femur 2.7–3.2× as long as broad (Fig. 80)........................................................................ 3

- Head, in lateral view, with antennae inserted at, or slightly below level of centre of head, and eyes less displaced ventrally (Figs 60, 71). Flagellum slender, more or less filiform, with 17–22 flagellomeres (Figs 59, 69). Hind leg slender, with femur 3.5–3.8× as long as broad (Fig. 74)........................................................................ 4

3. Head, in lateral view, subrectangular, strongly flattened frontally, and 1.9× as high as broad (from lower margin of clypeus to top of head) (Fig. 63). Mesosoma very strongly compressed laterally, with mesoscutum, in dorsal view, 0.55× as broad as head (Fig. 62). Ovipositor weakly and evenly upcurved (Fig. 64)..................................... B. conlisus sp. nov.

- Head, in lateral view, globose, rounded frontally, and 1.5× as high as broad (from lower margin of clypeus to top of head) (Fig. 78). Mesosoma less strongly compressed laterally, with mesoscutum, in dorsal view, 0.65× as broad as head (Fig. 77). Ovipositor almost straight and the apex strongly upcurved (Fig. 81).................................... B. robustus sp. nov. 71). Flagellum with 17–18 flagellomeres.................................................... B. globosus sp. nov. - Frons shagreened (Fig. 59). Head, in lateral view, with antennae inserted slightly below the level of the centre of head (Fig. 60). Flagellum usually with 20–22 flagellomeres, rarely with 19 flagellomeres.................. B. aucklandellus sp. nov.