Key to species of Eutetrapha Bates

1 Pronotum without transverse ridges; body mostly covered with scales or pubescence................................2

- Pronotum with fine transverse ridges (Figs. 156 g–1 & 156g –2); body not covered with scales or pubescence (except some spots on elytra); body large, metallic green; elytron with four yellowish pubescent spots; legs brown...................................................................................................... E. flavoguttata Pu & Jin

2 Body not covered with scales, but covered with pubescence....................................................3

- Body covered with metallic green or blue scales............................................................14

3 Body covered with reddish pubescence....................................................................4

- Body covered with grayish, khaki, grass green or light blue pubescence...........................................5

4 Basal half of elytron with four black maculae (not including the humeral angle); apical half of elytron without a large black macula (combination of several small maculae)............................................... E. elegans Hayashi

- Basal half of elytron with three black maculae (not including the humeral angle); apical half of elytron sometimes with a large black macula (combination of several small maculae)........................................... E. cinnabarina Pu

5 Pronotal disc without maculae........................................................................... 6

- Pronotal disc with maculae..............................................................................7

6 Prothorax with black macula on each side; elytron with one black longitudinal stripe................ E. bicostata Hayashi

- Prothorax without black macula on each side; elytron with one median transverse black macula and one indistinct black trans- verse vitta in middle of apical half, sometimes with a small spot at basal 1/5...................... E. velutinofasciata Pic

7 Pronotum without distinct black maculae and elytra trimmed with narrow black stripes decorated with several grayish-white pubescent spots.......................................................................................8

- Pronotum with distinct black maculae and elytra not trimmed with narrow stripes...................................9

8 Elytral black trim has six grayish-white pubescent spots....................................... E. stigmosa Pu & Jin

- Elytral black trim has seven grayish-white pubescent spots....................... E. parastigmosa Lin & Yang, sp. nov.

9 Pronotal disc with four somewhat rounded black spots.......................................................10

- Pronotal disc with only two longitudinal black markings...................................................... 11

10 Elytron with two rows of punctures between the two humeral carinae; elytral black spots smaller and equal to or less than eight.................................................... E. sedecimpunctata (Motschulsky) [subspecies not separated]

- Elytron with a row of punctures between the two humeral carinae; elytral black markings larger, irregular in shape and more than eight........................................................................... E. complexa Pu & Jin

11 Body covered with brick red brown pubescence; metatarsi with golden brown long hairs............. E. weni Huang & Lin

- Body covered with green to blue pubescence; metatarsi without golden brown long hairs............................12

12 Pronotum with one pair of round spots; elytron with five black maculae; body covered with grass green pubescence, somewhat yellowish........................................................................... E. chlorotica Pu & Jin

- Pronotum with one pair of elongated maculae; elytron with four large black maculae...............................13

13 Elytral maculae large and subquadrate, all four maculae reaching lateral margin; sides of each abdominal segment with black maculae............................................................................ E. laosensis Breuning

- Elytral maculae smaller and unregularly shaped, the first and fourth maculae not reaching lateral margin (the fourth sometimes reaching lateral margin); sides of each abdominal segment without black maculae............... E. shiqianensis Pu & Jin

14 Elytron with metallic blue scales; pronotal black maculae large, length subequal to width, or length less than twice of width 1 5

- Elytron with metallic green scales; pronotal black maculae smaller, or length subequal to or more than twice of width when large...............................................................................................17

15 Scales stout (length less than twice of width, Fig. 151 k); pronotal black maculae longer than broad but with length less than twice of width; apical half of elytron without a black arc............................ E. tianmushana Lin & Bi, sp. nov.

- Scales slender (length more than tripe of width, Fig. 154 k); pronotal black maculae with length subequal to width; apical half of elytron with a black arc..............................................................................16

16 The two black markings on basal half of elytron reaching neither lateral carina nor suture; the black arc on apical half of elytron not reaching suture and the metallic blue spot wider than the width of the arc........... E. lini Chou, Chung & Lin

- The two black markings on basal half of elytron both reaching lateral carina and the second one before middle also reaching suture; the black arc on apical half of elytron reaching suture and the metallic blue spot narrower than the width of the arc.................................................................................. E. gui Lin & Yang, sp. nov.

17 Elytral disc has three black markings, including an arc on apical half............................................18

- Elytral disc has four black markings, without an arc on apical half..............................................20

18 Elytral apex rounded; the arc on apical half of elytron thinner, narrower than the width from black arc to suture; pronotal black spots smaller, narrower than the width between the two black spots...................... E. metallescens (Motschulsky)

- Elytral apex with tooth at the outer angle; the arc on apical half of elytron thicker, wider than the width from black arc to suture; pronotal black spots larger, wider than the width between the two black spots.............................. 19

19 Elytral apex with a longer tooth at the outer angle; elytral maculae larger............ E. chrysochloris chrysochloris (Bates)

- Elytral apex with a shorter tooth at the outer angle; elytral maculae more or less smaller...................................................................................................... E. chrysochloides chrysargyrea Bates

20 Elytral apex with tooth at the outer angle; sides of metatarsi with white hairs... part of E. chrysochloides chrysargyrea Bates

- Elytral apex rounded; sides of metatarsi with black hairs......................................................21

21 Pronotal black spots larger, wider than the width between two spots; anterior claw of metatarsi of male appendiculate with a tooth..................................................................... E. tianmushana Lin & Bi, sp. nov.

- Pronotal black spots smaller, narrower than the width between two spots; claws of metatarsi of male simple....................................................................................... E. shaanxiana Lin & Yang, sp. nov.