Atrichopogon, KIEFFER, 1906 WITH

KEY TO THE ADULT ATRICHOPOGON KIEFFER, 1906 WITH View in CoL PIGMENTED WINGS OF THE NEOTROPICAL REGION

The males of A. (A.) nebulosus Macfie, 1939 View in CoL and A. (A.) nubeculosus Macfie, 1949 View in CoL and the females of A. (A.) ornatipennis Clastrier, 1987 View in CoL , A. (A.) pictipennis Clastrier, 1979 View in CoL and A. (A.) delecollei Rossi, Marino & Spinelli , n. sp. are unknown. Since the females of different species are very similar, it is highly recommended to make the sex association.

1. Wing with extensive dark spots, covering all apical margin of wing ( Figs 5D View FIG ; 6C View FIG ) ........................................ 2

— Wing with two dark spots, one over r-m and second in cell r 3 posterior to apex of R 3 ( Figs 1E View FIG ; 2C View FIG ; 3D View FIG ; 4C View FIG ; 7D View FIG ) .......................................................................................................................................................... 4

2. Distal 1/3 of wing dark with two elliptic pale spots, one subapically in r 3 and another extending from apical portion of m 1 to m 2; males with gonostylus gradually tapering and curved, with pointed apex ....................... ................................................................................................................... A. (A.) cavus Felippe-Bauer, 2012 View in CoL

— Distal 1/3 of wing entirely dark ( Figs 5D View FIG ; 6C View FIG ) ............................................................................................ 3

3. Hind leg paler than fore and midlegs ( Fig. 5E View FIG ); males with gonostylus slender, tapering from base, apex single ( Figs 5F View FIG ; 8C View FIG ) ............................................................................ A. (A.) soriai Rossi, Marino & Spinelli , n. sp.

— Legs with similar coloration; males with gonostylus thick with two pointed apical prongs .............................. ................................................................................................................ A. (A.) maculipennis Clastrier, 1968 View in CoL

4. Males .......................................................................................................................................................... 5

— Females ..................................................................................................................................................... 18

5. Gonostylus tapering flattened and curved, apex spatulate or with flange ( Figs 1G View FIG , 8A View FIG ) ............................... 6

— Gonostylus double, forked or single, pointed at apex ( Figs 3G View FIG ; 5F View FIG ; 7G View FIG ; 8B; 8C; 8D View FIG ) ................................. 7

6. Antenna without sexual secondary dimorphism ( Fig. 1A View FIG ); scutum without lateral suture ( Fig. 1D View FIG ) ................ ............................................................................................. A. (A.) tricuspis Rossi, Marino & Spinelli , n. sp.

— Antenna with plume setae ( Fig. 3A View FIG ); scutum with lateral suture ( Fig. 7E View FIG ) ...................................................... .............................................................................................................. A. (A.) janseni Pessoa & Farias, 2021 View in CoL

7. Gonostylus double or forked ( Figs 3G View FIG ; 8B View FIG ) ................................................................................................. 8

— Gonostylus single, not forked ( Figs 5F View FIG ; 7G View FIG ; 8C; 8D View FIG ) ................................................................................ 15

8. Gonostylus double, articulated at base ......................................................................................................... 9

— Gonostylus forked, not articulated at base ( Figs 3G View FIG ; 8B View FIG ) ........................................................................... 10

9. Posterior margin of tergite 9 rounded, not surpassing apex of gonocoxite; sternite 9 with lateral group of scattered setae .................................................................................... A. (A.) casali Cavalieri & Chiossone, 1973 View in CoL

— Posterior margin of tergite 9 elongated as a setose finger-like process, greatly surpassing apex of gonocoxite; sternite 9 with transverse row of setae ...................................................... A. (A.) dactilus Felippe-Bauer, 2012

10. Gonostylus forked near its base ................................................................................................................. 11

— Gonostylus forked near midlength or close to the apex .............................................................................. 12

11. Inner portion of gonostylus slender, strongly curved .................................. A. (A.) pictipennis Clastrier, 1979 View in CoL

— Inner portion of gonostylus slender, nearly straight ........................... A. (A.) shawadawa Felippe-Bauer, 2018

12. Gonostylus forked close to the apex, basal half swollen and inner prong sclerotized ....................................... .............................................................................................. A. (A.) sergioluzi Farias, Santos & Pessoa, 2021 View in CoL

— Gonostylus forked near midlength ( Figs 3G View FIG ; 8B View FIG ) ...................................................................................... 13

13. Trochanter of hind leg bearing black spines ( Fig. 3E View FIG ) .. A. (A.) trochantispina Rossi, Marino & Spinelli , n. sp.

— Trochanter of hind leg without black spines .............................................................................................. 14

14. Inner portion of gonostylus elongate, curved apically, longer than outer portion ............................................ .................................................................................................................. A. (A.) nukini Felippe-Bauer, 2018 View in CoL

— Outer portion of gonostylus 4 × longer than inner portion ............................................................................... ................................................................................... A. (A.) riopardensis Farias, Pessoa & Paulino-Rosa, 2021 View in CoL

15. Posterior margin of tergite 9 with 1 or 2 small median lobes ..................................................................... 16

— Posterior margin of tergite 9 rounded, without lobes.................................................................................. 17

16. Posterior margin of tergite 9 bilobated ............................................. A. (A.) bicuspis Borkent & Picado, 2004 View in CoL

— Posterior margin of tergite 9 with a small median lobe ................... A. (A.) clastrieri Spinelli & Marino, 2007 View in CoL

17. Gonostylus thick; gonocoxal apodeme stout, directed laterally ................. A. (A.) ornatipennis Clastrier, 1987 View in CoL

— Gonostylus slender tapering from base; gonocoxal apodeme slender, directed anteriorly ( Figs 7F View FIG ; 8D View FIG ) ........... ............................................................................................ A. (A.) delecollei Rossi, Marino & Spinelli , n. sp.

18. Abdominal tergites 1-6 or 1-3 and 5-6 with dark lateral patches ( Fig. 5D View FIG ) ................................................ 19

— Abdominal tergites 1-6 without dark lateral patches ( Figs 2D View FIG ; 6D View FIG ) ........................................................... 27

19. Abdominal tergites 1-6 with dark lateral patches ....................................................................................... 20

— Abdominal tergites 1-3 and 5-6 with dark lateral patches, tergite 4 without or with a smaller patch ( Fig. 5D View FIG ) .................................................................................................................................................................. 21

20. Flagellomeres 9-13 paler than flagellomeres 1-8; mandible without teeth ....................................................... .............................................................................................................. A. (A.) janseni Pessoa & Farias, 2021 View in CoL

— Flagellomeres uniformly brown; mandible with 20 teeth .............. A. (A.) casali Cavalieri & Chiossone, 1973 View in CoL

21. Trochanter of hind leg with black spines ( Fig. 3E View FIG ) ....... A. (A.) trochantispina Rossi, Marino & Spinelli , n. sp.

— Trochanter of hind leg without black spines .............................................................................................. 22

22. Palpus with segments 4 and 5 partially fused .......................................... A. (A.) dactilus Felippe-Bauer, 2012

— Palpus with segments 4 and 5 separated .................................................................................................... 23

23. Spermatheca large and elliptical, about as broad as long, with elongate and stout neck ................................... .............................................................................................. A. (A.) sergioluzi Farias, Santos & Pessoa, 2021 View in CoL

— Spermatheca ovoid, longer than broad, with short neck ............................................................................ 24

24. Mandible poorly developed, without teeth ................................................................................................ 25

— Mandible well developed, with teeth ......................................................................................................... 26

25. Wing length longer than 1.13 mm .................................................... A. (A.) shawadawa Felippe-Bauer, 2018

— Wing length shorter than 1.10 mm .......................................................... A. (A.) nukini Felippe-Bauer, 2018 View in CoL

26. Wing length longer than 1.14 mm; mandible with 21 teeth ............. A. (A.) bicuspis Borkent & Picado, 2004 View in CoL

— Wing length shorter than 0.90 mm; mandible with 24 teeth .......................................................................... ................................................................................. A. (A.) riopardensis Farias, Pessoa & Paulino-Rosa, 2021 View in CoL

27. Posterior margin of scutum with pair of bunches of short setae, each on stout rounded base ( Fig. 1D View FIG ) ....... 28

— Posterior margin of scutum without bunches of short setae ....................................................................... 29

28. Spermatheca lightly sclerotized .................................................................... A. (A.) nubeculosus Macfie, 1949 View in CoL

— Spermatheca heavily sclerotized, scutum without lateral suture ( Fig. 2E View FIG , 9A View FIG ) ................................................. ............................................................................................. A. (A.) tricuspis Rossi, Marino & Spinelli , n. sp.

29. Flagellomeres 9-13 darker than flagellomeres 1-8 ............................................ A. (A.) nebulosus Macfie, 1939 View in CoL

— Flagellomeres 9-13 paler than flagellomeres 1-8 .............................. A. (A.) clastrieri Spinelli & Marino, 2007 View in CoL