Key to Chinese species of Encarsia with a clear asetose area around the stigmal vein of the fore wing (females)

1 Mid tarsus 4-segmented (including individuals with the last two segments partly fused and indicated by a transverse suture) (Figs 5, 6, 7, 13, 14), tarsal formula 5:4:5................................................................... 2

- Mid tarsus distinctly 5-segmented (Figs 21, 27, 36), tarsal formula 5:5:5.......................................... 3

2(1) Scutellar sensilla widely separated (by about 7–8× own maximum width) (Fig. 3); distance between anterior pair of scutellar setae distinctly greater (1.25–1.57×) than that between posterior pair (Fig. 3); ovipositor distinctly shorter (0.58–0.7×) than mid tibia................................................................... E. dianensis Li & Geng, sp. nov.

- Scutellar sensilla narrowly separated (by about their own maximum width) (Fig. 11); distance between anterior pair of scutellar setae distinctly less (0.7×) than that between posterior pair (Fig. 11); ovipositor longer (1.15–1.19×) than mid tibia...................................................................................... E. hayati Li & Geng, sp. nov.

3(1) Longest marginal fringe of fore wing about as long as or longer than maximum wing width (Figs 20, 26)................. 4

- Longest marginal fringe of fore wing distinctly less than maximum wing width (Fig. 34)............................. 9

4(3) Petiole smooth, without sculpture (Fig. 22); mid lobe of mesoscutum with 2 setae (Fig. 19); clava 2-segmented (Fig. 18)................................................................................... E. biseta Li & Geng, sp. nov.

- Petiole with sculpture (Fig. 29); mid lobe of mesoscutum with 4 setae (Fig. 25); clava 3-segmented (Fig. 24).............5

5(4) Distance between scutellar sensilla a little less than maximum width of a sensillum (Fig. 25); distance between anterior pair of scutellar setae distinctly less (0.52×) than that between posterior pair (Fig. 25); basal cell of fore wing asetose (Fig. 26); F2 a little longer than F1 (Fig. 24); body almost entirely pale yellow (Fig. 28)................... E. huangi Li & Geng, sp. nov.

- Distance between scutellar sensilla at least 2× maximum width of a sensillum; distance between anterior pair of scutellar setae equal to or greater than that between posterior pair; basal cell of fore wing with 1 or 2 setae; F2 not longer than F1; body at least partly brownish................................................................................... 6

6(5) Gaster almost entirely brown to dark brown, only apex of T7 yellow.............................................. 7

- Gaster almost entirely yellow or pale brown................................................................ 8

7(6) Submarginal vein of fore wing with 1 seta.......................................... E. lounsburyi (Berlese & Paoli)

- Submarginal vein of fore wing with 2 setae..................................................... E. citrina (Craw)

8(6) Body robust, broad (Huang & Polaszek 1998, fig. 74); fore wing disc relatively densely setose (Huang & Polaszek 1998, fig. 71); scutellar sensilla relatively closely placed, separated by little more than twice their maximum width (Huang & Polaszek 1998, fig. 74)............................................................ E. curtifuniculata Huang & Polaszek

- Body slender (Huang & Polaszek 1998, fig. 136); fore wing disc less densely setose (Huang & Polaszek 1998, fig. 135); scutellar sensilla more widely spaced (Huang & Polaszek 1998, fig. 136)................. E. gracilens Huang & Polaszek

9(3) Head dark brown with pale lines; mesosoma with axillae completely dark brown.............. E. longifasciata Subba Rao

- Head mostly or entirely pale yellow to yellow; mesosoma with axillae completely yellow or at most slightly brownish at apex................................................................................................... 10

10(9) Mid lobe of mesoscutum with either 8(4+2+2) or 10(4+2+2+2) setae............................................ 11

- Mid lobe of mesoscutum at most with 4(2+2) setae.......................................................... 12

11(10) Fore wing clearly infuscated below marginal vein; mesoscutum dark anteriorly.................... E. nipponica Silvestri

- Fore wing not infuscated below marginal vein, a small dark spot at stigmal vein and parastigma; mesoscutum entirely pale........................................................................................ E. gerlingi Viggiani

12(10) Mid lobe of mesoscutum with 2 setae (Fig. 33); each side lobe of mesoscutum with 2 setae (Fig. 33); F2 with 1 longitudinal sensillum (Fig. 32); third valvula 0.36–0.4× as long as second valvifer................... E. yunnana Li & Geng, sp. nov.

- Mid lobe of mesoscutum either with 4 setae or asetose; each side lobe of mesoscutum with 1 seta; F2 without longitudinal sensilla; third valvula at least 0.5× as long as second valvifer..................................................... 13

13(12) Mid lobe of mesoscutum asetose; F1 about as long as F2; marginal fringe of fore wing distinctly longer than half wing width (0.75–0.85×)..................................................................... E. aseta Hayat & Polaszek

- Mid lobe of mesoscutum with 4 setae; F1 distinctly shorter than F2; marginal fringe of fore wing about half wing width (0.47– 0.6×).............................................................................................. 14

14(13) Head yellow with clypeus margin brownish; F3 a little longer than F1+F2; ovipositor shorter than, or up to 1.1× length of the mid tibia, but distinctly shorter than mid tibia and basitarsus combined............................. E. mineoi Viggiani

- Head entirely yellow; F3 distinctly shorter than F1+F2; ovipositor a little longer than mid tibia and basitarsus combined................................................................................ E. flavescens Huang & Polaszek