Key to species (males) of Neurigona from Chinese mainland (modified from Wang et al. 2007) 1 Abdominal segment 5 with ventral projection ............................................................................................................ 2 - Abdominal segment 5 without ventral projection ..................................................................................................... 13 2 Abdomen metallic green except basal part yellow ...................................................................................................... 3 - Abdomen mainly yellow with black spot(s) ................................................................................................................ 4 3 Abdomen metallic green, tergum 1 with yellow basal margin; all legs yellow .............................................. N. grisea - Abdominal segments 1–3 yellow; legs chiefly yellow with coxa II brownish, from femur III to tarsus III brown to black ..................................................................................................................................................................... N. xui 4 Mesonotum entirely yellow ........................................................................................................................................ 5 - Mesonotum with large or small mid-posterior area brown or black.......................................................................... 12 5 Tarsomere I 4 with basal half swollen .......................................................................................................................... 6 - Tarsomere I 4 not swollen.............................................................................................................................................. 7 6 Arista dorsal; 5 dc bristles, 11–12 paired acr bristles; dorsal lobe of surstylus with apical incision ..... N. xiangshana - Arista apical; 8 dc bristles, 17–18 paired acr bristles; dorsal lobe of surstylus without apical incision ........................ .............................................................................................................................................................. N. guizhouensis 7 Tarsomere I 1 shorter than or as long as tibia I............................................................................................................... 8 - Tarsomere I 1 distinctly longer than tibia I.................................................................................................................. 11 8 Scutellum with small brownish basal spot; tarsomere I 1 as long as tibia I .................................................... N. basalis - Scutellum without brownish basal spot; tarsomere I 1 shorter than tibia I .................................................................... 9 9 Coxa I with 6–7 black anterior apical bristles; dorsal lobe of surstylus with short and obtuse process at dorsal corner ............................................................................................................................................................... N. shaanxiensis - Coxa I with 4–6 yellow apical bristles; surstylus not as above .................................................................................. 10 10 Coxa II with black pubescence and bristles; dorsal lobe of surstylus with long and thin process at dorsal corner ...... ....................................................................................................................................................................... N. henana - Coxa II with yellow pubescence and bristles; dorsal lobe of surstylus without process at dorsal corner .......... N. wui 11 Six dc bristles, 18–19 paired acr bristles; dorsal lobe of surstylus short and wide ................................ N. xizangensis - Three dc bristles, acr bristles absent; dorsal lobe of surstylus with wide base and long obtuse apex ... N. jiangsuensis 12 Mesonotum with narrow mid-posterior brown spot; both tibia II and tarsus II with row of short erect pale av bristles; cercus with long apical process............................................................................................................. N. zhejiangensis - Mesonotum with wide black mid-posterior area; tibia II or tarsus II without row of av bristle; cercus without long apical process ...................................................................................................................................... N. guangxiensis 13 Coxa I with black apical bristles................................................................................................................................ 14 - Coxa I with yellow apical bristles.............................................................................................................................. 19 14 Tarsomere I 1 shorter than tibia I................................................................................................................................. 15 - Tarsomere I 1 longer than tibia I................................................................................................................................... 18 15 More than 10 paired acr bristles ................................................................................................................................ 16 - Four paired acr bristles ................................................................................................................................ N. yunnana 16 Seventeen to eighteen paired acr bristles .......................................................................................... N. concaviuscula - Eleven to twelve paired acr bristles .......................................................................................................................... 17 17 Tarsomere I 4 with basal half swollen and apical half concave ventrally, tarsomere I 5 with basal 1/4 swollen and middle portion concave ventrally........................................................................................................ N. sichuana sp. nov. - Tarsomere I 4-5 normal, without swollen or concave portion ......................................................... N. hainana sp. nov. 18 Femur I without row of av bristles; tibiae II–III wholly yellow; epandrium with 2 long and wide lateral processes; ventral lobe of surstylus straight and broad, apically with 4 strong hairs....................................... N. guangdongensis - Femur I with row of short av bristles; tibiae II–III each with black apex; epandrium with 2 slender lateral processes; ventral lobe of surstylus curved and slender, apically with 1 thick hair ................................................. N. bimaculata 19 Femur I with row of yellow av bristles ............................................................................................. N. shennongjiana - Femur I without row of yellow av bristles ................................................................................................................. 20 20 Mesonotum with black mid-posterior or lateral spot(s).............................................................................................. 21 - Mesonotum entirely yellow ........................................................................................................................................ 23 21 Tarsomere I 5 slightly thickened, with long and strong bristles ................................................................................... 22 - Tarsomere I 5 not thickened, without long and strong bristles ...................................................................... N. centralis 22 Pleuron chiefly yellow; fore claw distinctly elongated, spine-like.......................................................... N. micropyga - Pleuron chiefly black; fore claw normal ............................................................................................... N. yaoi sp. nov. 23 Tarsomere I 1 as long as tibia I, tarsomere II 1 longer than tibia II............................................................ N. qingchengshana - Tarsomere I 1 shorter than tibia I, tarsomere II 1 shorter than tibia II............................................................................. 24 24 Tibia I with 1 ad bristle and 1 pd bristle; tarsomere III 1 with about 15 dense short erect spine-like black v bristles at base; wing with anterior apical corner brownish; dorsal lobe of surstylus with apical incision ....... N. xiaolongmensis - Tibia I without ad or pd bristle; tarsomere III 1 without black v bristle at base; wing wholly hyaline; dorsal lobe of surstylus without apical incision .................................................................................................................. N. ventralis

Published as part of Wang, Mengqing, Chen, Hongyin & Yang, Ding, 2010, New species of the genus Neurigona (Diptera: Dolichopodidae) from China, pp. 53-61 in Zootaxa 2517 (1) on pages 54-55, DOI: 10.11646/zootaxa.2517.1.6, http://zenodo.org/record/5302128