Key to the Indian species of Foenatopus

(After original descriptions and keys by Narendran et al. 2001 and Narendran & Sureshan 2003)

1. Ovipositor sheath distinctly shorter than body (Figs 3, 21, 23, 24, 25, 28, 30, 31, 32, 44)............................. 2

- Ovipositor sheath approx. as long as or distinctly longer than body (Figs 2, 4, 26, 27, 29, 55)........................ 15

2. Ovipositor sheath entirely black (Figs 3, 24, 30, 31, 32)....................................................... 3

- Ovipositor sheath with a distinct subapical ivory or whitish band, but band yellowish and ill-defined in F. rugiceps (21, 23, 25, 28, 44).............................................................................................. 8

3. Hind femur with 3 teeth ventrally; first metasomal tergite distinctly longer than remaining segments; [lower head ivory to white; pronotum with distinct transverse carinae and striae] (Fig. 3)................. F. anupam (Narendran & Sureshan)

- Hind femur with 2 teeth ventrally; first metasomal tergite subequal or shorter than remaining segments................. 4

4. Vertex with 2 carinae between ocelli (Fig. 35); propodeum anteriorly alutaceous to imbricate (Fig. 36)...................................................................... F. sureshani Binoy, van Achterberg & Girish Kumar sp. nov.

- Vertex with 3 or more carinae between ocelli; propodeum at least with scattered punctures anteriorly................... 5

5. Vertex with 3 carinae between ocelli; [vein SR1 of fore wing nearly twice as long as vein r]............. F. aequalis Elliott

- Vertex with 4 or more carinae between ocelli............................................................... 6

6. Mesoscutum without a medio-longitudinal groove; scape twice as long as pedicel; [vertex with 4 carinae between ocelli]............................................................................ F. sudhae (Narendran & Sureshan)

- Mesoscutum with a medio-longitudinal groove at least posteriorly; scape less than twice as long as pedicel.............. 7

7. Vertex at most with 3 carinae between ocelli; [ovipositor sheath more than 0.5× length of body in lateral view].......................................................................................... F. jodhpurensis Narendran

- Vertex with 5 carinae between ocelli............................................. F. stom (Narendran & Sureshan)

8. Hind femur with 3 teeth ventrally........................................................................ 9

- Hind femur with 2 teeth ventrally (Fig. 52)................................................................ 12

9. Vertex with 2 carinae between ocelli; [central hind femoral tooth white].......................... F. bilineatus (Elliott)

- Vertex with 3–4 carinae between ocelli................................................................... 10

10. Vertex with 3 carinae between ocelli; basal and central femoral teeth white, apical one black; [pale ring of ovipositor sheath yellowish].............................................................................. F. rugiceps Elliott

- Vertex with 4 carinae between ocelli; all femoral teeth black.................................................. 11

11. Ovipositor sheath more than twice as long as metasoma; scape at most 1.25× as long as pedicel................................................................................................. F. priyae (Narendran & Sureshan)

- Ovipositor sheath at most twice as long as metasoma; scape more than 1.5× as long as pedicel............................................................................................... F. keralensis (Narendran & Sureshan)

12. Stemmaticum near occiput with a distinct medio-longitudinal groove............... F. idukkiensis Sureshan & Narendran

- Stemmaticum near occiput without medio-longitudinal groove................................................ 13

13. Ovipositor sheath shorter than metasoma.............................................. F. chinnarensis (Sureshan)

- Ovipositor sheath distinctly longer than metasoma (Figs 21, 44)............................................... 14

14. Pronotum multicarinate; a longitudinal rufescent line down the centre of frons from apical tubercle to antennae; scutellum, deplanate, smooth and shiny; [vein SR1 of fore wing slightly longer than vein r (Fig. 21)]........... F. frontilinea (Morley)

- Pronotum entirely coriaceous; frons medially black, without any such medial rufescent line; scutellum slightly convex, coriaceous.................................................................... F. weii Chen, van Achterberg & Xu

15. First metasomal tergite as long as or distinctly longer than remaining metasomal tergites combined................... 16

- First metasomal tergite shorter than remaining metasomal tergites combined..................................... 21

16. Ovipositor sheath 0.9–1.0× as long as body; hind femur with 2 large ventral teeth (Fig. 12).......................... 17

- Ovipositor sheath 1.3–1.5× longer than body; hind femur with 3 large ventral teeth................................ 19

17. Pterostigma approx. 9.0× longer than its maximum width; vein 2-CU1 present but much shorter than vein 1-CU1............................................................................................ F. indicus (Westwood)

- Pterostigma 14.0–15.0× longer than its maximum width; vein 2-CU1 either present and longer than vein 1-CU1 or absent... .................................................................................................. 18

18. Whitish part of ovipositor sheath approx. 0.9× as long as apical black part of sheath; large ventral teeth of hind femur unequal, basal one nearly equilateral and apical one narrow, much longer than wide; vein 2-CU1 of fore wing absent......................................................................................... F. achterbergi Gupta & Gawas

- Whitish part of ovipositor sheath approx. 1.6× as long as apical black part of sheath (Fig. 14); both large ventral teeth of hind femur equal; vein 2-CU1 of fore wing longer than vein 1-CU1 (Fig. 11)............................................................................................... F. chareshi Binoy, van Achterberg & Girish Kumar sp. nov.

19. Wings more or less infumate basally; occiput smooth; vertex with 3 carinae between ocelli........ F. longicaudalis (Elliott)

- Wings hyaline; occiput distinctly rugose or striate; vertex with 2 carinae between ocelli............................. 20

20. Vein 2-CU1 of fore wing absent........................................................... F. iridipennis Elliott

- Vein 2-CU1 of fore wing present, long................................................... F. maheshi Narendran

21. Vertex with 3 carinae in between ocelli; ovipositor sheath 3× as long as post petiolar segments............................................................................................. F. wynadensis (Sureshan & Narendran)

- Vertex with 4–5 carinae between ocelli; ovipositor sheath 3.5× as long as post petiolar segments..... F. similicus Narendran