Key to species of Aneuclis occurring in Vietnam

1. Fore wing with second recurrent vein (2 m-cu) distinct (Fig. 34). Ovipositor upcurved (Fig. 31)........................ 2

- Fore wing with second recurrent vein (2 m-cu) completely absent (Figs 19, 22). Ovipositor short and straight (Fig. 25) or long and sinuate apically.................................................................................... 3

2. Flagellum with 14 flagellomeres, unusually slender, with flagellomeres 2 and 3 almost 4.0× as long as broad (Fig. 27). Vertex more or less smooth, shining. Head, in dorsal view, with temple 0.45× as long as eye width (Fig. 28). Fore wing with second recurrent vein (2 m-cu) distinctly postfurcal (Fig. 26). Propodeum with apical area widely rounded anteriorly; basal keel 0.5– 0.6× as long as apical area (Fig. 30). Ovipositor strongly upcurved at extreme apex, without dorsal teeth (Fig. 31), its height at midlength about 1.5× width of hind basitarsus............................................. A. achterbergi sp. nov.

- Flagellum with 16 flagellomeres, robust, with flagellomeres 2 and 3 about 1.3× as long as broad (Fig. 33). Vertex granulate, dull (Fig. 32). Head, in dorsal view, with temple 0.65× as long as eye width (Fig. 32). Fore wing with second recurrent vein (2 m-cu) interstitial (Fig. 34). Propodeum with apical area pointed anteriorly; basal keel short, 0.3× as long as apical area (Fig. 35). Ovipositor more or less evenly upcurved apically, with two sharp dorsal subapical teeth (Fig. 36), its height at midlength equal to width of hind basitarsus........................................................... A. devriesi sp. nov.

3. Foveate groove of mesopleuron shallow, as densely granulate area, sometimes with fine irregular wrinkles (Fig. 17). Basal keel of propodeum about 0.6× as long as apical area (Fig. 18). Fore wing with metacarpus (R 1) very short (Fig. 19). Ovipositor longer than metasoma, sinuate apically..................................................... A. pumilus (Holmgren)

- Foveate groove sharp and deep, crenulate, extending almost entire length of mesopleuron (Fig. 23). Basal keel of propodeum 0.8–1.0× times as long as apical area (Fig. 24). Fore wing with metacarpus (R 1) almost reaching fore wing apex (Figs 20, 22). Ovipositor short and straight, about as long as apical depth of metasoma (Fig. 25)................. A. secunda (Khalaim)