Key to the adult males of Labrundinia

1. Abdomen with brown transverse bands on some tergites (Figs 19L; 31L)........................................ 2

- Abdomen uniformly brown (Figs 5L; 83L)............................................................... 34

2. Abdominal tergite II with divided or faint transverse band (Figs 11L; 41L) or without band (Fig. 67L)................. 3

- Abdominal tergite II with distinct continuous transverse band (Fig. 48L)....................................... 16

3. Abdominal tergite II with divided or faint transverse band.................................................... 4

- Abdominal tergite II without band....................................................................... 9

4. Abdominal tergite V completely brown (Fig. 11L).................................... Labrundinia costaricae sp. n.

- Abdominal tergite V with transverse band (Figs 19L; 45L)................................................... 5

5. Abdominal tergite V with divided transverse band (Fig. 37L).................................... Labrundinia meta

- Abdominal tergite V with continuous transverse band (Fig. 45L)............................................... 6

6. Wing with two bands of macrotrichia (Fig. 19F).............................................. Labrundinia fosteri

- Wing membrane not as above (Fig. 47F).................................................................. 7

7. Abdominal tergite V with faint transverse band (Fig. 41L)................................ Labrundinia nathani sp. n.

- Abdominal tergite V with distinct transverse band (Figs 45L; 47L)............................................. 8

8. Abdominal tergite V almost completely brown; tibial comb of fore leg absent (Fig. 47G); tibial comb of hind leg with 4 bristles (Fig. 47K).................................................................. Labrundinia panamensis sp. n.

- Abdominal tergite V with narrow transverse band; tibial comb of fore leg present (Fig. 45G); tibial comb of hind leg with 8 bristles (Fig. 45K).......................................................... Labrundinia nicaraguensis sp. n.

9. Abdominal tergite V with faint transverse band (Fig. 67L), or completely brown (Fig. 82L)........................ 10

- Abdominal tergite V with distinct transverse band (Figs 23L, 86L)............................................ 11

10. Abdominal tergite V with faint transverse band; tergite VIII without band; fore leg present with tibial comb (Fig. 67G).................................................................................... Labrundinia robacki sp. n.

- Abdominal tergite V completely brown; tergite VIII almost brown; fore leg without tibial comb (Fig. 82G)............................................................................................. Labrundinia trilucida sp. n.

11. R2+3 present (Fig. 23F)............................................................................... 12

- R2+3 absent (Fig. 58F)................................................................................ 15

12. Abdominal tergite V with narrow transverse band; tergite VI with arched band (Fig. 23L)................................................................................................................. Labrundinia hirsuta

- Abdominal tergite V brown on anterior ½ or more; tergite VI not as above (Figs 46L, 86L)......................... 13

13. Abdominal tergite V brown on anterior ¾ or more (Fig. 86L)................................ Labrundinia virescens

- Abdominal tergite V brown on anterior ½ (Fig. 46L)....................................................... 14

14. Abdominal tergites VI–VIII with transverse band (Fig. 46L); anterior process of sternapodeme small/absent (Fig. 46M)........................................................................................... Labrundinia opela

- Abdominal tergites VI–VIII completely brown (Fig. 55L); anterior process of sternapodeme moderately developed (Fig. 55M)......................................................................... Labrundinia paravirescens sp. n.

15. Wing length 1.4–1.5 mm; HR 1.78–1.77; anterior process of sternapodeme small (Fig. 58M)..... Labrundinia paulae sp. n.

- Wing length 1.2 mm; HR 1.45; anterior process of sternapodeme moderately developed (Fig. 24M)..................................................................................................... Labrundinia jasoni sp. n.

16. Abdominal tergite V almost or completely brown (Figs 70L; 75L)............................................ 17

- Abdominal tergite V with continuous transverse band (Figs 12L; 38L)......................................... 21

17. Abdominal tergite III completely brown (Fig. 61L)........................................................ 18

- Abdominal tergite III with continuous transverse band (Figs 27L, 42L).......................................... 19

18. Wing length 1.7–1.9 mm; hypopygium pale brown; abdominal tergite IX with 14 posterior setae (Fig. 61M)................................................................................................. Labrundinia pilosella

- Wing length 1.2 mm; hypopygium pale; abdominal tergite IX with 9 posterior setae (Fig. 70M)................................................................................................... Labrundinia semicurvata sp. n.

19. Abdominal tergite III more than ¾ brown (Fig. 27L)...................................... Labrundinia johannseni

- Abdominal tergite III with narrower continuous transverse band (Fig. 42L)..................................... 20

20. Abdominal tergite VI completely brown; hypopygium pale brown (Fig. 42M)................. Labrundinia neopilosella

- Abdominal tergite VI brown on anterior ¾; hypopygium dark brown (Fig. 75M).............. Labrundinia setosa sp. n.

21. Hypopygium uniformly pale or bicolored, with brown apical ½............................................... 22

- Hypopygium brown................................................................................. 23

22. Abdominal tergites VI–VIII each with transverse band; hypopygium with brown apical ½ (Fig. 12M).... Labrundinia fera

- Abdominal tergites VI–VIII each completely brown; hypopygium pale (Fig. 34M)........... Labrundinia mayaca sp. n.

23. R2+3 absent (Fig. 30F)................................................................................ 24

- R2+3 present (Fig. 76F)............................................................................... 30

24. Fore leg ratio (LR) 0.56–0.68.......................................................................... 25

- Fore leg ratio (LR) 0.74–0.91.......................................................................... 26

25. Trapezoidal membranous anal point with apical edge notched (Fig. 31M)..................... Labrundinia longipalpis

- Rounded membranous anal point with apical edge convex (Fig. 16M)....................... Labrundinia fittkaui sp. n.

26. Abdominal tergite VII brown on basal ¾................................................................. 27

- Abdominal tergite VII completely brown................................................................ 28

27 Sternapodeme forming an acute angle apically, with distinct anterior process (Fig. 30M)...... Labrundinia kogilamae sp. n.

- Sternapodeme rounded apically, without anterior process (Fig. 79M)............................ Labrundinia tenata

28. Tentorium 142 Μm long; hypopygium brown (Fig. 38M)............................. Labrundinia multidentata sp. n.

- Tentorium 150–179 Μm long; hypopygium pale brown...................................................... 29

29. Wing length 1.6–1.7 mm; membranous anal point notched; gonocoxite ratio (GcR) 2.46–2.54 (Fig. 13)................................................................................................ Labrundinia fiorelinii sp. n.

- Wing length 1.2–1.3 mm; membranous anal point simple; gonocoxite ratio (GcR) 1.88–2.2........................................................................ Labrundinia parareniformis sp. n. and Labrundinia reniformis sp. n.

30. Fore leg ratio (LR1) 0.60–0.66; hypopygium pale brown.................................................... 31

- Fore leg ratio (LR1) 0.69–0.78; hypopygium brown........................................................ 32

31. Abdominal tergites VII–VIII brown on each anterior ¾ or more (Fig. 20L); membranous anal point rounded, apical edge notched (Fig. 20M)................................................................. Labrundinia gregi sp. n.

- Abdominal tergites VII–VIII completely brown (Fig. 49L); membranous anal point rounded, apical edge convex (Fig. 49M)............................................................................ Labrundinia parafittkaui sp. n.

32. Abdominal tergite VI completely brown (Fig. 72L)......................................... Labrundinia separata

- Abdominal tergite VI with continuous transverse band (Figs 8L, 76L).......................................... 33

33. Tibial comb with 5 bristles (8K); abdominal tergite VI with transverse band posteriorly (Fig. 8L). Labrundinia carolae sp. n.

- Tibial comb with 7–8 bristles (76K); abdominal tergite VI with transverse band anteriorly (Fig. 76L).................................................................................................... Labrundinia sofiae sp. n.

34. R2+3 present (Fig. 4F)................................................................................. 35

- R2+3 absent (Fig. 83F)................................................................................ 37

35. Tentorium 150 Μm long (Fig. 4C); gonostylus with an intern depression subapically (Fig. 4K). Labrundinia amazonica sp. n.

- Tentorium 124–143 Μm long (Fig. 48C); gonostylus not as above............................................. 36

36. Abdominal tergites II–IV each with darker cruciate marks (Fig. 48L); LR1 0.77–0.81............. Labrundinia parabecki

- Abdominal tergites II–IV evenly coloured (Fig. 5L); LR1 0.55................................... Labrundinia becki

37. Tentorium 90–126 Μm long (Fig. 83C).............................................. Labrundinia unicolor sp. n.

- Tentorium 149–192 Μm long (Fig. 1C)............................................. Labrundinia amandae sp. n.