Bactrocera Macquart

Singh, Maneesh Pal, Gupta, Divender, Hancock, David Lawrence, Sharma, Isha & Sharma, Prem Lal, 2023, A new species of Bactrocera Macquart reared from Solanum khasianum Clarke in northern India and a new synonym, Zootaxa 5380 (6), pp. 526-540 : 527-529

Key to species of subgenus Bactrocera Macquart in India (Adopted from David et al. 2017)

1. Postsutural supra-alar seta present........................................................................ 2

- Postsutural supra-alar seta absent........................................................................ 39

2. Prescutellar acrostichal seta present....................................................................... 3

- Prescutellar acrostichal seta absent...................................................................... 37

3. Wing with faint costal band, subapical band fused with radial-medial band; scutellum with broad, black, basal, triangular marking; males attracted to cue lure (Andaman Islands)................................. B. albistrigata (de Meijere)

- Wing with prominent costal band from cell sc to wing apex or narrowed after vein R2+3 or discontinuous before expanding slightly towards apex.................................................................................. 4

4. Costal band discontinuous beyond vein R2+3 with a break or very narrowly continuous before expanding towards apex; males attracted to methyl eugenol............................................................................. 5

- Costal band continuous, of almost uniform width, sometimes with an apical expansion.............................. 8

5. Scutum reddish brown; face with two distinct black spots.................................... B. zonata (Saunders)

- Scutum black; face with spots coalescing to form a transverse line or separate black spots............................ 6

6. Face with separate black spots, tergites III–V wholly black................................... B. tuberculata (Bezzi)

- Face with spots coalescing to form a transverse line; tergites III–V not entirely black................................ 7

7. Abdominal tergites III–V orange-brown, tergites IV and V with narrow dark lateral margins; scutellum with a narrow black basal band............................................................................. B. correcta (Bezzi)

- Abdominal tergites III–V mostly black; scutellum with a broad black basal band.................. B. penecorrecta Drew

8. Fore, mid and hind femur fulvous........................................................................ 9

- All or at least forefemur with fuscous markings............................................................ 22

9. Scutum predominantly reddish brown or brown............................................................ 10

- Scutum predominantly black........................................................................... 16

10. Scutum with dark fuscous markings or mottled due to the attachment of muscles.................................. 11

- Scutum uniformly coloured, without fuscous markings....................................................... 13

11. Lateral postsutural vitta uniform in width and reaching intra-alar seta........................................... 12

- Lateral postsutural vitta narrowed posteriorly and ending well before intra-alar seta; males attracted to cue lure............................................................................................. B. paraosbeckiae Drew

12. Costal band confluent with R2+3 and narrow, lanceolate marking on thorax with red-brown colour, not broadened apically; males attracted to methyl eugenol......................................... B. invadens Drew, Tsuruta and White

- Costal band weakly overlapping R2+3 and broadened apically; males attracted to cue lure (Andaman Islands; also Bhutan).............................................................................. B. bhutaniae Drew & Romig

13. Scutellum with an apical black spot; males attracted to methyl eugenol........................... B. versicolor (Bezzi)

- Scutellum without apical black spot...................................................................... 14

14. Abdominal tergites III–V black, large sized species (7.8−8.3 mm); males attracted to methyl eugenol.................................................................................................... B. aethriobasis (Hardy)

- Abdominal tergites III–V reddish brown, medium-sized species (5−6 mm)....................................... 15

15. Abdominal sternites pale orange-brown; aculeus tip acute with preapical steps or projections; males attracted to methyl eugenol (Andaman Islands)............................................................. B. blairiae Drew and Romig

- Abdominal sternites fuscous to black; aculeus tip needle-like; males attracted to cue lure..... B. rubigina (Wang and Zhao)

16. Lateral postsutural vitta broad (> 0.15 mm ................................................................ 17

- Lateral postsutural vitta narrow (<0.15 mm)............................................................... 19

17. Wing with costal band expanding in apical portion, ceromata black, epandrium with posterior lobe and anterior lobe of lateral surstylus fork-shaped (lateral view); males attracted to methyl eugenol (Andaman Islands)...................................................................................................... B. ranganathi Drew and Romig

- Wing with costal band uniformly narrow in apical portion, ceromata reddish brown, epandrium not as above............ 18

18. Lateral postsutural vitta ending beyond intra-alar seta; males attracted to methyl eugenol (Andaman Islands)................................................................................................. B. dorsalis (Hendel)

- Lateral postsutural vitta ending before intra-alar seta; males attracted to zingerone........... B. syzygii White and Tsuruta

19. Scutum and pleural areas black, lateral postsutural vitta narrowed posteriorly; abdominal tergum III entirely dark fuscous to black; males attracted to cue lure............................................. B. merapiensis Drew and Hancock

- Scutum brownish to black, with area behind and beneath lateral postsutural vittae brown, lateral postsutural vitta of uniform width; abdominal tergum III never completely dark fuscous or black; males attracted to methyl eugenol................ 20

20. Costal band slightly overlapping vein R2+3.................................. B. verbascifoliae Drew and Hancock

- Costal band confluent with vein R2+3.................................................................... 21

21. Costal band not widening from the apex of R2+3 to extremity of wing; abdominal tergites III–V reddish with a prominent Tshaped mark [some specimens]........................................... B. invadens Drew, Tsuruta and White

- Costal band widening gradually from the apex of R2+3 to extremity of wing; abdominal tergites with dark markings in lateral regions....................................................................... B. paraverbascifoliae Drew

22. Scutum reddish brown with or without fuscous markings..................................................... 23

- Scutum black....................................................................................... 24

23. Costal band broad, confluent with vein R4+5, expanded into an apical spot; all femora with preapical markings; males attracted to cue lure (Andaman Islands)..................................................... B. andamanensis (Kapoor)

- Costal band narrow, confluent with vein R2+3, not expanded into an apical spot; midfemur with preapical spot; males attracted to methyl eugenol................................................................. B. psuedoversicolor Drew

24. Scutellum with an apical black spot; males attracted to cue lure........................... B. apiconigroscutella Drew

- Scutellum without an apical black spot................................................................... 25

25. Face entirely black; males attracted to cue lure............................................................. 26

- Face with two black spots.............................................................................. 27

26. Lateral postsutural vitta ending at or just before intra-alar seta and not narrowing posteriorly...................................................................................... B. divenderi Maneesh, Hancock and Prabhakar

- Lateral postsutural vitta ending at or a little beyond anterior supra-alar seta and narrowing posteriorly........................................................................................ B. nigrofemoralis White and Tsuruta

27. Lateral postsutural vitta ending at anterior supra-alar seta; males attracted to cue lure............. B. neonigrotibialis Drew

- Lateral postsutural vitta extending beyond anterior supra-alar seta, normally reaching or enclosing intra-alar seta........ 28

28. Anepisternal stripe broad, almost reaching postpronotal lobe; costal band expanded into a distinct semicircular apical spot; aculeus apically trilobed; males not attracted to known lures................................... B. latifrons (Hendel)

- Anepisternal stripe narrow and not reaching postpronotal lobe; costal band uniformly narrow or only slightly expanded apically; aculeus often not trilobed; male attraction to lures variable.................................................... 29

29. All femora with preapical dark spots or bands.............................................................. 30

- Only forefemur or fore and hind femora with preapical dark spots.............................................. 33

30. Costal band narrow, confluent with R2+3................................................................. 31

- Costal band broad, confluent with R4+5; males attracted to cue lure (Andaman Islands).............. B. limbifera (Bezzi)

31. Costal band slightly expanded in apical portion; three pairs of frontal setae; aculeus apically trilobed; males not attracted to known lures.......................................................................... B. prabhakari sp. n.

- Costal bend evenly narrow in apical portion, not expanded; two pairs of frontal setae; aculeus apically needle-like or bifid... .................................................................................................. 32

32. Face without a black medial band; female aculeus tip acute, spicules of eversible membrane broad with 8–10 small projections; males attracted to methyl eugenol........................................................ B. caryeae (Kapoor)

- Face with a black longitudinal medial band in addition to the two spots in antennal furrows; female aculeus tip bifid, spicules of eversible membrane conical-shaped; male unknown............................... B. furcata David and Hancock

33. Only forefemur with preapical dark spot.................................................................. 34

- Fore and hind femora with preapical dark spots; males attracted to methyl eugenol.................. B. neoarecae Drew

34. Costal band broadened towards apex and ending near middle of cell r4+5........................................ 35

- Costal band of uniform width........................................................................... 36

35. Abdomen with a prominent T-shaped pattern; males attracted to methyl eugenol (Andaman Islands)............................................................................................ B. carambolae Drew and Hancock

- Abdomen with diffuse dark colour pattern; males attracted to cue lure (Andaman Islands)................................................................................................... B. melastomatos Drew and Hancock

36. Postpronotal lobe yellow; males attracted to cue lure................................. B. vishnu Drew and Hancock

- Postpronotal lobe with dark red-brown anteromedial corner; males attracted to methyl eugenol.... B. amarambalensis Drew

37. Wing with basal cells (bc and c) with a fulvous tint; costal band almost confluent with R4+5 and expanded into a broad spot towards apex; scutum with fuscous or black areas; males attracted to cue lure (Andaman Islands) [some specimens]..................................................................................... B. andamanensis (Kapoor)

- Wing with basal cells (bc and c) either fuscous or colourless; costal band either of uniform width or with a narrow or bare section distal to the apex of R2+3 before expanding into a small apical spot; scutum without dark patches; males attracted to methyl eugenol...................................................................................... 38

38. Basal cells (bc and c) fuscous; costal band almost confluent with R4+5 and slightly widening towards apex..................................................................................... B. apicofuscans White and Tsuruta

- Basal cells (bc and c) colourless; costal band with a narrow or bare section distal to the apex of R2+3 before expanding into a small apical spot........................................................................ B. affinis (Hardy)

39. Scutum reddish brown; prescutellar acrostichal setae present; aculeus tip trilobed; males attracted to cue lure.......................................................................................... B. digressa Radhakrishnan

- Scutum black; prescutellar acrostichal setae absent; females not known; males attracted to cue lure............................................................................................... B. fastigata Tsuruta and White