Pedrillia, Westwood, 1864

Li, Kaiqin & Liang, Hongbin, 2018, A check list of the Chinese Zeugophorinae (Coleoptera: Megalopodidae), with new synonym, new record and two new species of subgenus Pedrillia from China, Zootaxa 4455 (1), pp. 127-149 : 131-132

Key to subgenus Pedrillia species from China

1. Dorsal surface unicolored, or head and pronotum more darker color than elytra..................................... 2

- Head and pronotum different color with elytra............................................................... 6

2. Elytra elongate, subparallel laterally; elytra elongate.......................................................... 3

- Elytra lateral sides parallel on basal one third and then gradually expanded backward, broadest behind the middle; elytra wide short................................................................................................ 4

3. Pronotum elongate, apex of lateral tubercle sharp; dorsal surfaces pale yellowish brown................................................................................................ Zeugophora (Pedrillia) gracilis Chûjô, 1937

- Pronotum width slightly longer than length, apex of lateral tubercle round; dorsal surfaces brown, or most portion of head, pronotum and elytral sutural margin black ( Fig. 15 )....................... Zeugophora (Pedrillia) dimorpha Gressitt, 1945

4. Body yellowish brown; antennae yellowish brown; lateral tubercle of pronotum hind margin truncation.................................................................................... Zeugophora (Pedrillia) indica Jacoby, 1903

- Dorsal surfaces uniformly yellowish brown, underside entirely or most portion black; antennae most portion of basal two segments yellowish brown, rest black; lateral tubercle of pronotum hind margin gradually narrowed....................... 5

5. Lateral tubercle strongly prominent, hind margin of lateral tubercle truncation; Head with frontal suture present ( Fig. 6 )................................................................ Zeugophora (Pedrillia) yunnanica Chen & Pu, 1962

- Lateral tubercle prominent, hind margin of lateral tubercle gradually narrowed ( Figs 29 , 31 ); Head with frontal suture absent............................................................ Zeugophora (Pedrillia) longicornis Westwood, 1864

6. Elytra unicolored, immaculate........................................................................... 7

- Elytra maculate...................................................................................... 14

7. Pronotum unicolored................................................................................... 8

- Pronotum with two colors.............................................................................. 10

8. Head and pronotum black brown, Elytra dark blue, with metallic lustre, without maculation; pronotum with some protrusion.................................................. Zeugophora (Pedrillia) xanthopoda Bezděk & Silfverberg, 2010

- Pronotum reddish brown; elytra yellowish brown or reddish brown.............................................. 9

9. Head black, pronotum reddish brown, elytra yellowish brown, antennae basal four segments yellowish brown; pronotum with groove absent along middle line................................... Zeugophora (Pedrillia) tricolor Chen & Pu, 1962

- Head brown, pronotum reddish brown, elytra yellowish brown, antennae yellowish brown except basal four segments brown; pronotum with groove present along middle line......................... Zeugophora (Pedrillia) ruficollis Chûjô, 1932

10. Basal or apical segments yellowish brown, rest black........................................................ 11

- Antennae black...................................................................................... 12

11. Lateral tubercle of pronotum strongly prominent, hind margin of lateral tubercle truncation; head with frontal suture present ( Fig. 6 )..................................................... Zeugophora (Pedrillia) yunnanica Chen & Pu, 1962

- Lateral tubercle prominent, hind margin of lateral tubercle gradually narrowed ( Fig. 28 ); head with frontal suture absent................................................................ Zeugophora (Pedrillia) longicornis Westwood, 1864

12. Body length about 3 mm; legs black; elytra subparallel laterally, narrow, brown; head with frontal suture............................................................................. Zeugophora (Pedrillia) impressa Chen & Pu, 1962

- Body length about 5 mm; legs black with reddish brown or yellowish brown; elytra wide short, lateral sides parallel on basal one third and then gradually expanded backward, broadest behind the middle..................................... 13

13. Pronotum and elytra finely punctate; meso coxae reddish brown............... Zeugophora (Pedrillia) nitida Chûjô, 1932

- Pronotum and elytra coarsely punctate; meso coxae black................... Zeugophora (Pedrillia) bicolor Kraatz, 1879

14. Most portion of head, pronotum and elytral sutural margin black strip, rest dorsal surface brown ( Fig. 14 ).............................................................................. Zeugophora (Pedrillia) dimorpha Gressitt, 1945

- Elytral sutural margin without black strip.................................................................. 15

15. Elytra black, central with one yellowish brown marking, apex yellowish brown.................................................................................................. Zeugophora (Pedrillia) formosana Gressitt, 1945

- Elytra without marking, but with other shaped spot.......................................................... 16

16. Elytra with round or reniform spot....................................................................... 17

- Elytra without round or reniform spot..................................................................... 19

17. Spot large, round or subquadrate; elytra reddish brown, each elytron with two large luminous yellow spots, the prior one round, the posterior one subquadrate, each of them broadly margined with black tinge...................................................................................................... Zeugophora (Pedrillia) decorata Chûjô, 1937

- Spot small, approximate reniform; each elytron with one pale or yellowish brown spot margined with black............. 18

18. Spot generally reniform, the anterior black margin of spot generally arc-shaped, spot white or pale yellow; the size of body small; pronotum without black spots................................... Zeugophora (Pedrillia) annulata Baly, 1873

- Spot generally transverse, the anterior black margin of spot generally transverse, spot yellowish brown, the same color with elytra; the size of body large; pronotum without black spots..... Zeugophora (Pedrillia) bifasciata Gressitt & Kimoto, 1961

19. Elytra only with a black spot on apices.................................................................... 20

- Elytra with two or more spots........................................................................... 21

20. Elytra yellow, one sixth of apex black; pronotum black........................ Zeugophora (Pedrillia) nigroapica n.sp.

- Elytra reddish brown, one fifth of apex black; pronotum black except basal margin reddish brown.............................................................................................. Zeugophora (Pedrillia) emeica n. sp.

21. Elytra yellowish brown, lateral sides of each elytron with two dark brown spotsnear humeri and behind middle............................................................................ Zeugophora (Pedrillia) ornata ( Achard, 1914)

- Elytra disc with separated black spots..................................................................... 22

22. Elytra yellowish brown, each elytron with three brownish black small spots, one near scutellum, the others parallel on apex.................................................................. Zeugophora (Pedrillia) maculata Chûjô, 1941

- Elytra brown, each elytron near scutellum, behind humeri and behind middle with two black spots and separated punctured, or behind middle with three scattered spots, before apex with one narrowed black band................................................................................................. Zeugophora (Pedrillia) multisignata Pic, 1944

Figures

FIGURES 14–15. Zeugophora (Pedrillia) dimorpha Gressitt, 1945. 14. Dorsal view; 15, Paratype deposited in CAS, dorsal side. Scale line = 2.0 mm (Fig. 14).

FIGURES 5–6. Frons, anterior view. 5. Zeugophora (Zeugophora) ancora Reitter, 1900 from Ningxia (China), female, circle indicating concave on centre of frons; 6. Zeugophora (Pedrillia) yunnanica (Chen & Pu, 1962) from Yunnan (China), arrow indicating frontal suture. Scale line = 0.5 mm.

FIGURES 26–29. Type of Zeugophora (Pedrillia) longicornis Westwood, 1864. 26. Type of Z. (P.) longicornis on the same plate, dorsal; 27. Label; 28–29, Type of Z. (P.) longicornis. Scale line = 2.0 mm.

FIGURES 30–32.Type of Zeugophora (Pedrillia) bicoloriventris Pic, 1911. 30. Label; 31. Dorsal view; 32. Lateral view. Scale line = 2.0 mm.