Tricyclea van der Wulp

1. Male............................................................................................................................... 2

­ Female........................................................................................................................... 8

2. Head dichoptic; ors 1+1, well developed; mid tibia without v..................................... 3

­ Head sub­holoptic to holoptic; no ors developed; mid tibia with v.............................. 5

3. Abdominal tergites with small apical spots; ov developed; scutum with more or less extended black median stripe which does not surpass row of dc.................................... ............................................................................................... T. martini (Zumpt) (p. 72)

­ Abdominal tergites entirely yellowish brown, without spot; ov absent; scutum entirely yellowish brown, or broadly blackened, extended to row of ia.................................... 4

4. Ov absent; scutum entirely yellowish brown ......................... T. flavida Malloch (p. 72)

­ Ov present; scutum broadly blackened, extended outside row of ia............................... ............................................................................................. T. claripennis Séguy (p. 70)

5. 5 th tergite without paired apical spots or demarcated marginal band, or with entire indistinct pattern; genal dilation entirely clothed in blackish hairs............................... 7

­ 5 th tergite with pair of well demarcated apical spots; genal dilation clothed in yellowish hairs on posterior........................................................................................................... 6

6. Thorax with broad fuscous spot of varying size; tergites 3–4 with relatively broad black marginal band; eyes holoptic in ♂ (not recorded from Namibia).......................... ..................................................................................................... T. f. fasciata Macquart

­ Thorax and abdomen with reduced black pattern; tergites 3–4 with narrow marginal band; eyes sub­holoptic .........................................T. f. ferruginea van der Wulp (p. 71)

7. 4 th tergite wholly blackish in dorsal view; parafacial narrower than width of 1 st flagellomere, with some black setulae above .............................. T. dubia Zumpt (p. 70)

­ 4 th tergite brownish orange along anterior margin; parafacial subequal to width of 1 st flagellomere, without black setulae, only with pale minute hairs................................... ............................................................................................ T. semicinerea Bezzi (p. 73)

8. Thorax entirely yellowish brown ........................................... T. flavida Malloch (p. 72)

­ Thorax with more or less pronounced dark pattern....................................................... 9

9. Abdomen entirely yellowish brown .................................... T. claripennis Séguy (p. 70)

­ Abdomen with more or less pronounced dark pattern................................................ 10

10. 5 th tergite with pair of well demarcated apical spots; palpus width varied; genal dilation largely clothed in yellowish hairs posteriorly............................................................. 11

­ 5 th tergite without paired apical spots or demarcated marginal band, or at most with trace of median dark stripe; palpus slender, not as broad as width of 1 st flagellomere; genal dilation entirely clothed in blackish hairs.......................................................... 13

11. Palpus slender, narrower than width of 1 st flagellomere; tergites 3–4 without marginal bands, except for three spots ................................................. T. martini (Zumpt) (p. 72)

­ Palpus as broad as width of 1 st flagellomere, strongly dilated apically; tergites 3–4 with marginal bands............................................................................................................ 12

12. Thorax with broad fuscous spot of varying size; tergites 3–4 with relatively broad black marginal band (not recorded from Namibia) ..................... T. f. fasciata Macquart

­ Thorax and abdomen with reduced black pattern; tergites 3–4 with narrow marginal band ....................................................................... T. f. ferruginea van der Wulp (p. 71)

13. 4 th tergite wholly blackish in dorsal view; parafacial with some black setulae above.... ..................................................................................................... T. dubia Zumpt (p. 70)

­ 4 th tergite brownish orange along anterior margin; parafacial without black setulae, only with pale minute hairs ................................................ T. semicinerea Bezzi (p. 73)