Key to species of subgenus Zeugophora from China

1. Elytra lateral sides parallel on basal one third and then gradually expanded backward, broadest behind the middle; basal and apical lateral sides of pronotum not parallel................................................................. 2

- Elytra lateral sides subparallel laterally; basal and apical lateral sides of pronotum parallel (Figs 1–2)................... 4

2. Apex of lateral tubercle of pronotum sharp; dorsal surfaces uniformly yellowish brown, elytra without spots........................................................................ Zeugophora (Zeugophora) chinensis Medvedev, 1997

- Apex of lateral tubercle of pronotum round; elytra with spots................................................... 3

3. Dorsal surfaces of pronotum uniformly yellow, each elytron with two large dark spots, one subquadrate near base, another elongate ovate behind the middle............................. Zeugophora (Zeugophora) tetraspilota Medvedev, 1997

- Dorsal surfaces of pronotum yellowish brown, elytra dark blue, each elytron with a oblique long yellow stripe before middle............................................................ Zeugophora (Zeugophora) bimaculata Kraatz, 1879

4. Lateral tubercle of pronotum round, behind lateral tubercle with deep concave (Fig. 1); pronotum and elytra unicolored or pronotum darker than elytra................................................................................ 5

- Lateral tubercle of pronotum cone, behind lateral tubercle with shallow concave (Fig. 2); pronotum reddish brown, elytra black........................................................... Zeugophora (Zeugophora) scutellaris Suffrian, 1840 5. Pronotum yellowish brown, median line with brown black stripe; elytra pale yellowish brown, along suture from base to apex forming a black anchor-shaped spot................................. Zeugophora (Zeugophora) ancora Reitter, 1900

- Pronotum and elytra unicolored, elytra immaculate........................................................... 6

6. Lateral tubercle of pronotum broad from anterior margin to posterior margin, anterior margin of lateral tubercle narrow gradually; dorsal surfaces uniformly brownish black with metallic luster.... Zeugophora (Zeugophora) nigroaerea Lopatin, 2008

- Lateral tubercle of pronotum narrow from anterior margin to posterior margin, anterior margin of lateral tubercle narrow strongly; dorsal surfaces brown or bluish black.............................................................. 7

7. Pronotum broad, base broad; dorsal surfaces brown except head black....... Zeugophora (Zeugophora) cribrata Chen, 1974

- Pronotum elongate, base narrow; dorsal surfaces uniformly bluish black with metallic luster........................................................................................... Zeugophora (Zeugophora) cyanea Chen, 1974