Macgregoromyia

Liu, Qifei & Yang, Ding, 2011, Three new species of the genus Macgregoromyia Alexander, with a key to world species (Diptera, Tipulidae), Zootaxa 2802, pp. 41-50 : 42

Key to world species of genus Macgregoromyia

Except for the new species, the key was compiled based on the literature as indicated. For brevicula , celestia , shikokuana and szechwanensis include reference to the very detailed figures in Savchenko 1983 (wing and male genitalia). For fohkienensis includes a female specimen from Chinese province Zhejiang.

1. Distal cells of wing with macrotrichia..................................................................... 2

- Distal cells of wing bare................................................................................ 4

2. Wing with r-m strongly arcuated, entering R4+5, R4+5 basally bent basad ( Alexander, 1955, p 367, fig. 2)................................................................................................. M. syusiro Alexander, 1955

- Wing with r-m slightly arcuated, entering Rs, R4+5 straight basally............................................... 3

3. Wing with R1+2 absent; posterior margin of tergite 9 with a V-shaped incision; apex of lobe of gonostylus narrowed; dorsal crest of clasper of gonostylus greatly convex ( Alexander 1932, Pl. I, fig. 3, Pl. II, fig. 32)..... M. szechwanensis Alexander, 1932

- Wing with R1+2 entire ( Fig. 5 ); tergite 9 ( Fig. 17 ) with posterior margin bearing three processes; lobe of gonostylus ( Fig. 18 ) with tip broad; clasper of gonostylus ( Fig. 19 ) with dorsal crest smooth........................ M. ternifoliusa sp. nov.

4. Wing with r-m entering Rs at fork of Rs.................................................................... 5

- Wing with r-m either entering Rs before fork of Rs or entering R4+5 beyond fork of Rs............................... 6

5. Femora brown with tips blackened; posterior margin of tergite 9 narrowly emarginated; basal beak of clasper of gonostylus short and obtuse, dorsal crest of clasper of gonostylus with a spine-like process, posterior crest laterally with a collar-like flange ( Alexander 1969, p 34, figs. 1, 2)............................................. M. babana Alexander, 1969

- Femora dark brown with bases broadly more yellowed; median lobe of tergite 9 very reduced; basal beak of clasper of gonos- tylus long and pointed, dorsal crest of clasper of gonostylus smooth, posterior crest small, without such flange ( Alexander 1954, Pl. I, figs. 1, 8).......................................................... M. shikokuana Alexander, 1954

6. Wing with r-m entering R4+5 beyond fork of Rs.............................................................. 7

- Wing with r-m entering Rs before fork of Rs................................................................ 8

7. Tergite 9 medially notched; posterior crest of clasper of gonostylus produced into an obtuse lobe ( Alexander 1933, Pl. II, fig. 26).......................................................................... M. brevicula Alexander, 1933

- Tergite 9 medially produced into a semicircular blade; posterior crest of clasper of gonostylus convex with apex produced backwards ( Alexander 1955, p 365)..................................................... M. itoi Alexander, 1955

8. R1+2 entire............................................................................................ 9

- R1+2 spur-like or absent................................................................................ 12

9. Rs original long before line of r-m ( Alexander 1929, Pl. I, fig. 3)..................... M. benguetensis Alexander, 1929

- Rs original nearly in line with r-m....................................................................... 10

10. CuA1 meeting M3 near middle of cell dm ( Edwards 1932, p 54)...................... M. perpendicularis Edwards, 1932

- CuA1 meeting M3 near fork of M........................................................................ 11

11. CuA1 meeting M3 at a point ( Fig. 10 ); tergite 9 with posterior margin bearing a shallow U-shaped incision ( Fig. 21 ); dorsal crest of clasper of gonostylus flat ( Fig. 23 )................................................... M. flatusa sp. nov.

- CuA1 fused with M3 for a short distance; tergite 9 with posterior margin bearing a deep U-shaped notch; dorsal crest of clasper of gonostylus convex ( Alexander 1931, Pl. I, fig. 5, Pl. III, figs. 44–46)................. M. brevisector Alexander, 1931

12. First flagellomere black or brown with base yellow.......................................................... 13

- First flagellomere entirely yellow....................................................................... 14

13. Rs arcuated before joint with r-m; R1+2 spur-like, apex touching Sc2 and closing cell sc2 ( Fig. 15)................................................................................................... M. fohkienensis Alexander, 1949

- Rs straight before joint with r-m; R1+2 represented by a basal spur, paralleled with Sc2 ( Fig. 14 ).... M. rectangularis sp. nov.

14. r-m meeting Rs near fork of Rs; beak of clasper of gonostylus produced ( Alexander 1962, Pl. I, fig. 1, Pl. III, fig. 39).................................................................................. M. sikkimensis Alexander, 1962

- r-m meeting Rs nearly at middle of Rs; beak of clasper of gonostylus small and bent downwards ( Alexander 1932, Pl. I, fig. 4, Pl. II, fig. 34).................................................................. M. celestia Alexander, 1932

Figures

FIGURES 1 – 5. Macgregoromyia ternifoliusa sp. nov. 1. Habitus of male, dorsal view; 2. Head, dorsal view; 3. Head, lateral view; 4. Thorax, lateral view. 5. Wing.

FIGURES 16 – 19. Macgregoromyia ternifoliusa sp. nov. Male. 16. Hypopygium, lateral view; 17. ninth tergite, dorsal view; 18. lobe of gonostylus, lateral view; 19. clasper of gonostylus, lateral view. Scale bar of 16 – 17 = 0.2 mm, 18 – 19 = 0.1 mm.

FIGURES 6 – 10. Macgregoromyia flatusa sp. nov. 6. Habitus of male, dorsal view; 7. Head, dorsal view; 8. Head, lateral view; 9. Thorax, lateral view. 10. Wing.

FIGURES 20 – 23. Macgregoromyia flatusa sp. nov. Male. 20. Hypopygium, lateral view; 21. ninth tergite, dorsal view; 22. lobe of gonostylus, lateral view; 23. clasper of gonostylus, lateral view. Scale bar of 20 – 21 = 0.2 mm, 22 – 23 = 0.1 mm.

FIGURES 11 – 14. Macgregoromyia rectangularis sp. nov. 11. Habitus of male, lateral view; 12. Head and thorax, lateral view; 13. Head, dorsal view. 14. Wing.