Iteaphila Zetterstedt

Key to Iteaphila with unbranched radial vein (R 4+5) from the Palaearctic Region

1 Male [unknown for I. caelebs].......................................................................... 2

- Female [unknown for I. falki sp. nov., I. kyrgyzstanensis sp. nov., I. sakhalinensis sp. nov., I. aktruensis sp. nov.]........ 16

2 Eyes dichoptic....................................................................................... 3

- Eyes holoptic........................................................................................ 4

3 Stylus not much longer than wide; terminalia almost entirely yellow (Fig. 13).................... I. dichoptica sp. nov.

- Stylus much longer than wide; terminalia very dark..................................... I. kyrgyzstanensis sp. nov.

4 Epandrium oval, with broad dorsal bridge connecting lamellae and narrow, dorsally directed surstylus; hypandrium clothed with short shiny projections (Fig. 21).................................................... I. beringiensis sp. nov.

- Epandrium narrowed, longer than wide, prolonged posteriorly, with narrow dorsal bridge and posteriorly directed surstylus; hypandrium not clothed with short shiny projections......................................................... 5

5 Surstylus held erect to epandrium (Figs 45, 56, 61, 75)........................................................ 6

- Surstylus directed posteriorly (Figs 29, 30)................................................................. 9

6 Surstylus very narrow and shiny (Figs 61, 75)............................................................... 7

- Surstylus broader, round and narrow apically (Figs 45, 56)..................................................... 8

7 Surstylus hook-like, shorter than cercus (Fig. 75)............................................ I. zontaki (Nowicki)

- Surstylus elongate and straight, as long as cercus (Fig. 61)...................................... I. miranda sp. nov.

8 Surstylus tapered to narrow point (Fig. 56); cercus broad with posterior, subapical lobe (Fig. 57); phallus slightly arched and broad at apex........................................................................... I. spinosa sp. nov.

- Surstylus digitiform with rounded tip; cercus narrow without posterior, subapical lobe; phallus strongly arched and slender at apex (Fig. 45).......................................................................... I. gracilis sp. nov.

9 Anepisternum and katepisternum with shiny spot on middle.................................................. 10

- Anepisternum and katepisternum greyish pollinose.......................................................... 11

10 Apex of phallus narrowed, directed horizontally and slightly sinuous; hypoproct process elongate; hypandrium with subapical subtriangular projection (Fig. 29)........................................................... I. bartaki sp. nov.

- Apex of phallus not narrowed, evenly curved ventrally; hypoproct process short; hypandrium evenly curved subapically (Fig. 30)..................................................................................... I. falki sp. nov.

11 Phallic guide long, produced beyond epandrium as far as phallus, well visible in situ (Figs 32, 53).................... 12

- Phallic guide short, not produced beyond epandrium, not visible in situ (Figs 60, 67)............................... 13

12 Tibiae and usually halteres yellowish; cercus short, as long as surstylus; phallic guide subequal in width to phallus (Fig. 53)..................................................................................... I. luteitibia sp. nov.

- Tibiae and halteres dark; cercus long, longer than surstylus; phallic guide broader than phallus (Fig. 32).. I. ribesii (Becker)

13 Phallus bent subapically nearly 90°, directed straight before arched apically (Fig. 67)............ I. oedalina (Zetterstedt)

- Phallus not bent subapically nearly 90°, gradually arched and curved apically (Figs 59, 60, 70)....................... 14

14 Surstylus broad with rounded apex; phallus often projected well beyond epandrium (Fig. 60)............ I. incus sp. nov.

- Surstylus narrow, hook-like; phallus arched along margin of epandrium (Figs 59, 70).............................. 15

15 Phallus prolonged, arched to hypandrium (Fig. 59).......................................... I. aktruensis sp. nov.

- Phallus not prolonged, arched to apex of epandrium (Fig. 70)............................... I. sakhalinensis sp. nov.

16 Halteres pale........................................................................................ 17

- Halteres dark........................................................................................ 19

17 Antennal stylus (excluding apical sensillum) distinctly longer than wide........... I. spinosa sp. nov. , I. luteitibia sp. nov.

- Antennal stylus (excluding apical sensillum) about as long as wide............................................. 18

18 Scutum viewed anteriorly subshiny, finely pollinose......................................... I. dichoptica sp. nov.

- Scutum viewed anteriorly densely pollinose...... I. gracilis sp. nov. , I. caelebs (Becker), I. oedalina (Zetterstedt) [in part]

19 Antennal stylus (excluding apical sensillum) about as long as wide............................................. 20

- Antennal stylus (excluding apical sensillum) distinctly longer than wide......................................... 21

20 Anepisternum and katepisternum shiny...................................................... I. bartaki sp. nov.

- Anepisternum and katepisternum dull with pruinescence................................................................................................. I. zontaki (Nowicki), I. oedalina (Zetterstedt) [in part], I. incus sp. nov.

21 Sternite 8 shiny..................................................................... I. beringiensis sp. nov.

- Sternite 8 with pruinescence............................................................... I. ribesii (Becker)