Stilobezzia (Eukraiohelea)

Bauer, Maria Luiza Felippe, 2017, Contributions to the knowledge of predaceous midges of the subgenus Eukraiohelea Ingram & Macfie of Stilobezzia Kieffer (Diptera: Ceratopogonidae), from Brazil, Zootaxa 4324 (3), pp. 557-570 : 558

Key to the American species of Stilobezzia (Eukraiohelea)

1 Females............................................................................................ 2

- Males............................................................................................. 6

2 Pale yellowish species; tarsomeres 5 of all legs with the same number of pairs of batonnets.......................... 3

- Pale or darkish species; tarsomeres 5 of all legs with variable numbers of pairs of batonnets........................... 4

3 Tarsomeres 5 of all legs with 2 pairs of batonnets ( Fig. 11 ); fore femur with 2 ventral spines; basal 1/3 of hind femur brown ( Fig. 10 ).................................................................... S. (E.) elegantula (Johannsen)

- Tarsomeres 5 of all legs with 1 pair of batonnets; fore femur without ventral spines; hind femur uniformly pale.......................................................................................... S. (E.) dorsofasciata (Lutz)

4 Darkish species; tarsomere 5 of fore leg with 1 pair of batonnets, tarsomere 5 of mid and hind legs with 2 pairs of batonnets................................................................................. S. (E.) amnigena Macfie

- Pale yellowish species; tarsomere 5 of fore and mid legs with 2 pair of batonnets, tarsomere 5 of hind leg with 1 pair of baton- nets ( Figs. 25 , 38 )..................................................................................... 5

5 Wing length 1.75–1.82 mm; spermatheca 90 x 57 µ; halter stem and base of knob brown............ S. (E.) proxima n. sp

- Wing length 1.30–1.37 mm, spermatheca 57 x 42 µ; halter uniformly brown............... S. (E.) quasielegantula n. sp

6 Tergite 9 without apicolateral processes; gonocoxite with proximal portion pale yellowish, distal portion contrasting dark brown ( Fig. 6 ).......................................................................... S. (E.) elegantula

- Tergite 9 with apicolateral processes; gonocoxite uniformly brown or pale yellowish............................... 7

7 Gonocoxite uniformly pale yellowish; apicolateral processes short, rounded ( Fig. 22 ).............. S. (E.) proxima n. sp

- Gonocoxite uniformly brown, apicolateral processes moderately elongate, lobe-like ( Fig. 35 )......................... 8

8 Gonostylus swollen subapically, apex with a heavily sclerotized, elongate, curved, pointed projection; cerci large, conspicuous ( Figs. 33–34 )................................................................. S. (E.) quasielegantula n. sp.

- Gonostylus swollen at midportion, apex without a heavily sclerotized, elongate, pointed projection; cerci very small............................................................................................. S. (E.) amnigena

Figures

FIGURES 8 – 14. Stilobezzia (Eukraiohelea) elegantula (Johannsen). Female. 8. thorax and abdomen, dorsal view. 9. head, frontal view. 10. legs. 11. tarsomeres 5 and claws. 12. wing. 13. abdomen, ventral view. 14. sternites 7 – 10 of abdomen and spermathecae, ventral view. Scale bars: 0, 0 5 mm.

FIGURES 23 – 28. Stilobezzia (Eukraiohelea) proxima Cazorla & Felippe-Bauer n. sp. Female. 23. head, frontal view. 24. trochanters, femora and tibiae. 25. tarsomeres 5 and claws. 26. wing. 27. abdomen, ventral view. 28. sternites 6 – 10 of abdomen and spermathecae, ventral view. Scale bars: 0, 0 5 mm.

FIGURES 36 – 42. Stilobezzia (Eukraiohelea) quasielegantula Cazorla & Felippe-Bauer n. sp. Female. 36. head, frontal view. 37. legs. 38. tarsomeres 5 and claws 39 wing. 40. abdomen, ventral view. 41. sernites 7 – 10 of abdomen and spermathecae. 42. habitus, dorsolateral view. Scale bars: 0, 0 5 mm.

FIGURES 1 – 7. Stilobezzia (Eukraiohelea) elegantula (Johannsen). Male. 1. head, dorso-frontal view. 2. apex of proboscis and palpi. 3. tarsomeres 5 and claws. 4. wing. 5. genitalia, dorsal view. 6. genitalia, ventral view. 7. apices of parameres. Scale bars 0, 0 5 mm.

FIGURES 15 – 22. Stilobezzia (Eukraiohelea) proxima Cazorla & Felippe-Bauer n. sp. Male. 15. thorax and abdomen, dorsal view. 16. head, frontal view. 17. apex of proboscis and palpi. 18. tarsomeres 5 and claws. 19. wing. 20. genitalia, ventral view. 21 genitalia, dorsal view. 22 detail of cerci and apicolateral processes. Scale bars: 0, 0 5 mm.

FIGURES 29 – 35. Stilobezzia (Eukraiohelea) quasielegantula Cazorla & Felippe-Bauer n. sp. Male. 29. head, dorso-frontal view. 30. proboscis and palpi. 31. tarsomeres 5 and claws. 32. wing. 33. genitalia, dorsal view. 34. genitalia, ventral view. 3 5 detail of cerci and apicolateral processes. Scale bars: 0, 0 5 mm.