Key to the species of the Keilbachia flagria group

In the key by Vilkamaa et al. (2006), the species of the group would run to couplet 2.

1. Gonostylus with an apical tooth (e.g. Figs 5–8) .......................................................................................... 2

- Gonostylus without an apical tooth (Fig. 9 A, B) ............................................................ K. oligonema sp. n.

2. Maxillary palpus three-segmented (Fig. 1 F–I) ........................................................................................... 3

- Maxillary palpus one- or two-segmented (Fig. 1 A–E)................................................................................ 7

3. Gonostylus mesially with two curved megasetae arising from a common basal body (Fig. 5) ................. 4

- Gonostylus mesially with three or more curved megasetae arising from a common basal body (e.g. Figs 6–8).............................................................................................................................................................. 5

4. The two curved megasetae of the gonostylus stout and short, their length less than half the width of the gonostylus (Fig. 5 D, E) ....................................................................................................... K. bicuspis sp. n.

- The two curved megasetae of the gonostylus slender and long, longer than the width of the gonostylus.... ................................................................................................................................. K. biflagrispina Mohrig

5. Gonostylus between the curved mesial megasetae and the apical tooth without additional megasetae ....... ........................................................................................................................................... K. flagria Mohrig

- Gonostylus between the long curved mesial megasetae and the apical tooth with three or more additional megasetae..................................................................................................................................................... 6

6. Gonostylus between the long curved megasetae and the apical tooth with three additional megasetae, teg- men broadly subtriangular and without prominent microtrichia at apex (Fig. 10) ................. K. rima sp. n.

- Gonostylus between the long curved megasetae and the apical tooth with five or six additional megasetae, tegmen with a broad base and narrow nearly parallel-sided apical part, with prominent microtrichia at apex (Fig. 6 A, B) ................................................................................................................. K. filigera sp. n.

7. Gonostylus mesially with seven or eight long curved megasetae arising from a common basal body (Figs

6C, D, 8F, G)................................................................................................................................................ 8 - Gonostylus mesially with at most six long curved megasetae arising from a common basal body (Figs 5 B, C, 7, 8D, E) .................................................................................................................................................. 9

8. The curved megasetae of the gonostylus short, shorter than the width of the gonostylus (Fig. 6 C, D), wing length less than 3 mm ......................................................................................................... K. fasciata sp. n.

- The curved megasetae of the gonostylus long, the longest ones equal to the width of the gonostylus, (Fig. 8 F, G) wing length ca. 4 mm .................................................................................................. K. gigas sp. n.

9. Gonostylus with two short and stout curved mesial megasetae arising from a common basal body, the length of these megasetae only about half the width of the gonostylus (Fig. 5 B, C) ................................... ................................................................................................................................ K. acamptochaeta sp. n.

- Gonostylus with three or more slender curved mesial megasetae arising from a common basal body, these megasetae longer than the width of the gonostylus................................................................................... 10

10. Maxillary palpus two-segmented (Fig. 1 E), gonostylus with three long curved mesial megasetae arising from a common basal body and with two additional megasetae between these and the apical tooth and with two or three conspicuously strong setae near the base of the apical tooth (Fig. 8 C, D) ....................... .......................................................................................................................................... K. foveolata sp. n.

- Maxillary palpus one-segmented (Fig.1 B), gonostylus with five long curved mesial megasetae arising from a common basal body, without megasetae or conspicuously strong setae between these and the apical tooth (Fig. 7) .................................................................................................................... K. flabellata sp. n.