Key to oriental species of Isoneuromyia Brunetti

1. Tibial spurs yellow to orange ........................................................................................ 2

­ Tibial spurs brownish black to black............................................................................. 5

2. Wing with infuscation apically; basal flagellomeres orange, apical ones black (Fig. 5)... (Borneo) .............................................................................. polybioides (Edwards)

­ Wing completely hyaline; flagellomeres unicolorous .................................................. 3

3. Frons, face, and fore coxae yellow ... (Sulawesi) ................ pallidopsis Evenhuis, n. sp.

­ Frons and face brown ... (Borneo)................................................................................. 4

4. Scutellum predominantly yellow ............................................. matilei Evenhuis, n. sp.

­ Scutellum dark brown .............................................................. tannia Evenhuis, n. sp.

5. Wing completely hyaline or with yellowish tinting along anterior margin................... 6

­ Wing smoky apically or with distinct infuscation apically or subapically.................. 10

6. Mesonotum orange, without contrasting dark pattern, or with weak brown stripes, median stripe faded or absent........................................................................................ 7

­ Mesonotum all black or yellowish with contrasting black to brown pattern; fore tibia with distinctive shiny orange pecten comb apically...................................................... 8

7. Mesonotum with brown hairs posteriorly (Fig. 18); gonostylus (cf. Fig. 34) bidentate ... (Borneo) ...................................................................................... xanthina (Edwards)

­ Mesonotum with golden yellow tomentum, black hairs restricted to patches above wing root (Fig. 12); gonostylus (Fig. 36) multidentate ... (Laos) .................................. .................................................................................................... glabra Evenhuis, n. sp.

8. Forecoxagoldenyellowtomentose,withoutdarkhairsexcepttypicalapicalones...(Borneo) ...................................................................................................... flava Evenhuis, n. sp.

­ Fore coxa with black hairs throughout .......................................................................... 9

9. Scutellumyellow;palpibrown;forefemurwithdensehairsbasally,bareapically...(Borneo) ........................................................................................................ jata Evenhuis, n. sp.

­ Scutellum brown; palpi yellow; fore femur with black hairs evenly distributed ... (Laos) ............................................................................................... variabilis Evenhuis, n. sp.

10. Occiput predominantly orange to yellow with darker occipital triangle..................... 11

­ Occiput predominantly brownish black to black......................................................... 15

11. Mesonotum with distinct dark stripes ......................................................................... 13

­ Mesonotum with stripes coalesced into one dark pattern ... (Laos)............................ 12

12 Basalantennalflagellomeresbrown,apicalsegmentsyellow;gonostylus(Fig.34)bidentate ............................................................................................... splendida Evenhuis, n. sp.

­ Antennal flagellomeres all yellowish orange; gonostylus (Fig. 35) multidentate .......... ............................................................................................... brunettii Evenhuis, n. sp.

13. Antennal flagellomeres unicolorous....... .................................................................. 14

­ Basal antennal flagellomeres black, apical ones yellow to orange ... (Laos) ................. .............................................................................................. nigribasis Evenhuis, n. sp.

14. Wing with apical infuscation extending to wing margin ... (Taiwan) .............................

............................................................................................ formosana (Okada), n. stat. ­ Wing with spot of infuscation subapically, not extending to wing margin ... (Laos) ..... ............................................................................................ subapicalis Evenhuis, n. sp. 15. Abdomen predominantly yellow orange to reddish orange ........................................ 16

­ Abdomen predominantly black ................................................................................... 18

16. Antennal flagellomeres black .......................................................... rufescens (Brunetti)

­ Antennal flagellomeres reddish yellow....................................................................... 17

17. Palpi brown; fore coxa brown basally, yellow apically ... (India) ...... grandis (Brunetti)

­ Palpi yellow; fore coxa all yellow to orange ... (Vietnam) ........... yorki Evenhuis, n. sp.

18. Antennal flagellomeres reddish yellow ... (Bangladesh, India, Sri Lanka)..................... ......................................................................................................... annandalei Brunetti

­ Antennal flagellomeres brown to black ........ ........................................................... 19

19. Abdominal segment 5 with yellow basally ... (Java) ................... elegantissima (Tollet)

­ Abdominal segment 5 all black.......... ....................................................................... 20

20. Face yellow; ocellar triangle darker than immediate surrounding area; fore femur brown dorsally, yellow ventrally ... (Java) ..................................... pulcherrima (Tollet)

­ Face brown; ocellar triangle and immediate surrounding area black; fore femur entirely reddish yellow with dense black hairs ... (Laos) ..... nigerrima Evenhuis, n. sp.