Key to the genera of Eumeninae from south India

1. Metasoma petiolate, T 1 in dorsal view usually longer, less than half as wide as T2 (Figs 74–78)....................... 2

- Metasoma not petiolate, T 1 in dorsal view usually broader, more than half as wide as T2 (Figs 79–85)................. 13

2. Mid tibia with two spurs (Fig. 44)........................................................................ 3

- Mid tibia with one spur (Figs 45–47)...................................................................... 4

3. Propodeal orifice narrow dorsally (Fig. 37); submarginal carina strongly produced, propodeal valvula elongate and free from submarginal carina posteriorly (Fig. 38)....................................................... Zethus Fabricius

- Propodeal orifice broad and rounded dorsally (Fig. 39); submarginal carina weakly produced, propodeal valvula and submarginal carina not free posteriorly (Fig. 40).................................................... Discoelius Latreille

4. Mesosoma globular, as wide as high (Fig. 13)............................................................... 5

- Mesosoma more or less flattened dorso-ventrally, distinctly longer than high (Fig. 14)............................... 8

5. Pronotum without pretegular carina (Fig. 17); T2 with apical lamella (Fig. 72)....................... Eumenes Latreille

- Pronotum with pretegular carina (Fig. 18); T2 without apical lamella (Fig. 73).................................... 6

6. T1 (petiole length) less than 1.25 × length of mesosoma, never shorter than mesosoma (Fig. 64)......... Delta de Saussure

- T1 (petiole length) 1.25 × or more length of mesosoma (Fig. 65)............................................... 7

7. Fore wing with prestigma longer than pterostigma (Fig. 58); F11 of ♂ long and hooked (Fig. 9).... Phimenes Giordani Soika

- Fore wing with prestigma shorter or equals pterostigma (Fig. 59); F11 of ♂ short, not hooked (Fig. 10)................................................................................................ Oreumenoides (de Saussure)

8. Axillary fossa oval (Fig. 25); propodeal valvula not fused to submarginal carina, submarginal carina produced as a pointeprocess above valvula (Fig. 41); SMC2 basally truncate (Fig. 55); Body size smaller than 10 mm ........................ 9

- Axillary fossa slit-like (Fig. 26); propodeal valvula fused to submarginal carina, submarginal carina not produced as a pointed process above valvula (Fig. 42); SMC2 basally acute (Figs 56–61); Body size more than 10 mm ..................... 10

9. Female with a distinct subcircular fovea below median ocellus (Fig. 3); metanotum unidentate (Fig. 49); propodeum not produced; T 1 in dorsal view conspicuously swollen in apical half (Fig. 66)............................. Labus de Saussure

- Female without fovea below median ocellus; metanotum not unidentate, precipitous (Fig. 35); propodeum with extensive horizontal portion, somewhat narrowed apically, behind the postscutellum, abruptly sloping posteriorly (Figs 35, 67); T 1 in dorsal view not conspicuously swollen in apical half (Fig. 67).................................. Cyrtolabulus van der Vecht

10. Mesepisternum with epicnemial carina absent (Fig. 15)...................................................... 11

- Mesepisternum with epicnemial carina present (Fig. 16)...................................................... 12

11. Fore wing with prestigma longer than pterostigma (Fig. 56); female with cephalic foveae (Fig. 5)... Pareumenes de Saussure

- Fore wing with prestigma shorter than pterostigma; female without cephalic foveae............. Pseumenes Giordani Soika

12. Mesoscutum without notauli (Fig. 27); S1 transversely striate posteriorly (Fig. 71)............. Coeleumenes van der Vecht

- Mesoscutum with notauli; S1 irregularly rugose posteriorly................................ Pseudozumia de Saussure

13. SMC2 petiolate anteriorly (Fig. 62); propodeal orifice narrow dorsally............... Alastor Lepeletier de Saint Fargeau

- SMC2 not petiolate anteriorly (Figs 55-61); propodeal orifice broad and rounded dorsally.......................... 14

14. Anterior face of pronotum with two small, deeply impressed medial pits or foveae; which may be sparse (Fig. 20), contiguous (Figs 21, 22), or faint in some species..................................................................... 15

- Anterior face of pronotum without medial pits or foveae (Fig. 19).............................................. 19

15. T1 without transverse carina........................................................................... 16

- T1 with transverse carina (Figs 51–53)................................................................... 17

16. Anterior face of pronotum with foveae coalesced, punctate laterally (Fig. 21), T1 subsessile, in dorsal view usually narrower than T2 (Fig. 79).............................................................. Paraleptomenes GiordaniSoika

- Anterior face of pronotum usually with foveae separated, smooth laterally; T 1 in dorsal view about as broad as T2........................................................................................ Stenodynerus de Saussure

17. T1 with two transverse carinae close together at crest of declivity (Fig. 51); T1 wider than long in dorsal view (Fig. 51).................................................................................. Subancistrocerus de Saussure

- T1 with one transverse carina (Figs 52–53); T1 variable in dorsal view......................................... 18

18. Anterior face of pronotum with foveae separated (Fig. 20); T1 smooth basally, forming acarinarium beneath apex of T1 that is often full of mites; T 1 in dorsal view wide and sessile (Fig. 80)............................. Parancistrocerus Bequaert

- Anterior face of pronotum with foveae coalesced (foveae contiguous) (Figs 21, 22); T1 without acarinarium; T 1 in dorsal view longer than wide, T2 much wider than T1......................................... Pseudonortonia Giordani Soika

19. T1 with transverse carina (Fig. 54)................................................. Lissodynerus Giordani Soika

- T1 without transverse carina (Figs 81–84)................................................................. 20

20. T1 with transparent or translucent apical border (Fig. 81).................................................... 21

- T1 without transparent or translucent apical border (Figs 82–84)...............................................23

21. Parategula not visible from above; tegulae posteriorely bent inwards (Fig. 31)................... Knemodynerus Blüthgen

- Parategula visible from above (Figs 33, 35, 36)............................................................. 22

22. Metanotum semicircular in shape from above (Fig. 29); tegula exceeds parategula posteriorly (Fig. 29)................................................................................................... Antodynerus de Saussure

- Metanotum not semicircular in shape from above; tegula not exceeds parategula posteriorly....... Euodynerus Dalla Torre

23. Metanotum bidentate (Fig. 48)........................................................ Antepipona de Saussure

- Metanotum not dentate................................................................................ 24

24. Tegula never exceeds parategula posteriorly (Fig. 36); axillary fossa much narrower than long, sometimes slit-like, (Figs 30, 36)................................................................................................ 25

- Tegula usually exceeds parategula posteriorly, or at least equalling it (Figs 32–33); axillary fossa oval, at least as wide as long (Fig. 32)........................................................................................... 29

25. Fore wing with prestigma half or less than the length of the pterostigma................. Stenodyneriellus Giordani Soika

- Fore wing with prestigma more than half the length of the pterostigma, often nearly equal (Figs 60, 61)................ 26

26. SMC3 separated from the apex of marginal cell by distance shorter than its minimum width (Fig.60)................................................................................................ Allorhynchium van der Vecht

- SMC3 separated from the apex of marginal cell by distance longer than its minimum width (Fig.61)................. 27

27. Scutum posteriorly and scutellum anteriorly smooth and impunctate (Fig. 30)...................... Rhynchium Spinola

- Scutum and scutellum punctate (Fig. 29).................................................................. 28

28. Mesepisternum without epicnemial carina.............................................. Indodynerus Gusenleitner

- Mesepisternum with epicnemial carina present........................................ Anterhynchium de Saussure

29. T1 subsessile, in dorsal view narrower than T2 (Fig. 85)................................. Apodynerus Giordani Soika

- T1 sessile, in dorsal view about as wide as T2.............................................................. 30

30. Metanotum projecting over propodeum; propodeum with sclerotized dorsolateral projections (Fig. 32); propodeum with submarginal carina not differentiated from valvula; SMC2 with second recurrent vein far from SMC3.................................................................................................. Xenorhynchium van der Vecht

- Metanotum not projecting over propodeum; propodeum without dorsolateral projections; propodeum with submarginal carina projecting as rounded lobe above valvula; propodeal valvula free from submarginal carina posteriorly; SMC2 with second recurrent vein nearly or completely interstitial with SMC3 (Fig. 63).............................. Epsilon de Saussure