Theopea Baly 1864

Key to the species of Theopea in East Asia, excluding species with modified clypeus in males

1 Longitudinal ridges on elytra distinct...................................................................... 2

- Longitudinal ridges on elytra indistinct or reduced........................................................... 9

2 Elytra with extremely coarse punctures, space between punctures narrower than diameters of punctures; head and prothorax yellow except vertex and pronotum; Taiwan (Figs 2 D–2H)......................................... collaris Kimoto

- Elytra with coarse punctures, space between punctures broader than diameters of punctures; head and prothorax metallic blue or green except mouth parts............................................................................. 3

3 General color metallic green; longitudinal ridges on elytra apically abbreviated from apical 1/3 (Figs 4 A–4C); antennomeres III–VII straight in males (Fig. 5A); Taiwan ..................................................... T. cheni sp. nov.

- General color metallic blue; longitudinal ridges on elytra not apically abbreviated; antennomeres III–VII more or less curved................................................................................4. (T. sauteri species group)

4 Males with longitudinal ridges on the elytra more or less reduced................................................ 5

- Males with longitudinal ridges on the elytra prominent...................................................... w8

5 Penis asymmetric, bent to the right (Figs 14 C–14E, 20C–20E)................................................. 6

- Penis symmetrical (Figs 15 C–15E, 18C–18F)............................................................... 7

6 Penis relatively slender, 10.0x longer than wide; dorsal sclerite of endophallus extremely elongate, 3.6x longer than basal piece; Laos (Figs 20 C–20E)............................................................... T. sekerkai sp. nov.

- Penis relatively broad, 9.0x longer than wide; dorsal sclerite of endophallus less elongate, 1.6x longer than basal piece; China (Figs 14 C–14E)............................................................... T. coerulea Gressitt & Kimoto

7 Triangular sclerites of endophallus elongate; ventral sclerites absent; basal piece longer than apical piece, with longitudinal row of tiny teeth along lateral margin; India (Figs 15 C–15E)...................................... T. geiseri sp. nov.

- Triangular sclerites of endophallus small; ventral sclerites present; basal piece shorter than apical piece, without tiny teeth; China, Laos, Vietnam (Figs 18 C–18F)...................................................... .. laosensis sp. nov.

8 Males with antennomeres III–X moderately curved (Fig. 19A); swollen tarsomeres I of front legs not apically narrowed (Fig. 19I); Taiwan ............................................................................. T. sauteri Chûjô

- Males with antennomeres III–X straight (Fig. 16A); swollen tarsomeres I of front legs apically narrowed (Fig. 16E); Taiwan ................................................................................... T. hainanensis. sp. nov.

9 Elytra with extremely coarse punctures, space between punctures narrower than diameters of punctures (Figs 2 A–2C); Japan ..................................................................................... T. aureoviridis Chûjô

- Elytra with moderately coarse punctures, space between punctures broader than diameters of punctures (Figs 8, 11)....... 10

10 General color sexually dimorphic, elytra yellowish brown with metallic green sides, pronotum and vertex metallic green in males; elytra entirely metallic green, prothorax and head yellow in females; hypomeron yellowish brown (Fig. 11); antenna in males relatively shorter, antennomeres V–IX less than six times longer than wide (Fig. 12A); Taiwan ........................................................................................................ T. kanmiyai (Kimoto)

- General color not sexually dimorphic, elytra, pronotum, and vertex metallic green or blue in both sexes; hypomeron dark or blackish brown (Fig. 8); antenna in males more slender, antennomeres V–IX more than six times longer than wide (Figs. 9A, 9B); Taiwan ........................................................................ T. irregularis Takizawa