Key to species of Nothybus from China

[Simplified from Lonsdale & Marshall (2016)]

1 Distal quarter of wing infuscated, except for 2 discreet circular spots anteriorly in radial cells, and sometimes one ill-defined pale patch in cell m 1 (Figs 7, 25, 34)...................................................................... 2

- Distal quarter of wing with dark brown apical and subapical bands; pale area between bands encompassing three clear spots (Figs 44, 63, 83)...................................................................................... 4

2 Velvety anterolateral patches on frons confluent, black area thus continuous across lower frons (Fig. 4); fore basitarsomere almost entirely white, with basal and distal dark areas no longer than diameter of tarsomere (Fig. 8)............. N. absens

- Velvety anterolateral patches on frons separate, black area of lower frons interrupted medially (Figs 22, 31); fore basitarsomere white except for dark apex and base, basal dark area several times longer than diameter of tarsomere (Figs 26, 35)......... 3

3 Abdominal tergites mostly yellowish orange with dark markings posteromedially and along lateral margin (Figs 20, 27, 28)............................................................................................ N. acrobates

- Abdominal tergites almost entirely dark brown (Figs 29, 36, 37)...................................... N. biguttatus

4 Subapical clear spots of wing arranged in a straight transverse line; vein CuA 1 with subapical spot usually distinct (Figs 44, 63)................................................................................................. 5

- Subapical clear spots of wing not arranged in a straight line and middle spot in cell r 4+5 displaced apically, subapical spot on vein CuA 1 faded or absent (Fig. 83)................................................................ N. sumatranus

5 Abdominal tergite 3 dark brown (Fig. 46); tergite 4 mostly dark brown, with large orange patches on each side (Figs 46–48); anterior margin of surstylus almost straight (Fig. 76)................................................... N. kempi

- Abdominal tergite 3 laterally reddish brown to orange (Fig. 58); tergite 4 almost entirely reddish brown to orange, medial strip and anterior and posterior margins narrowly darkened (Fig. 65); anterior margin of surstylus strongly convex (Fig. 77)........................................................................................... N. kuznetsovorum