Key to the species of Terataki

1. Abdomen dark brown to black (Fig. 2); aedeagus with paramere divided into two lobes near anterior 1/3 of length (Fig. 25); antennomeres 4–11 with microtrichiae; porose structure on sternite VII in males rounded (Fig. 18)......... Te. liliputanum

- Abdomen with metallic green or purple-green coloration (e.g., Fig. 1); aedeagus with paramere divided into two lobes near base (Figs. 20, 22; aedeagus unknown in Te. cate rinoi); antennomeres 5–11 with microtrichiae; porose structure on sternite VII in males transversely elongate (Fig. 19.................................................................... 2

2. Elytra light brown-orange (Fig. 1) and coloration of head and pronotum bright metallic green-purple (Figs. 3, 7).................................................................................................... Te. badiipennis

- Elytra dark metallic purple or green with coloration on head and pronotum either dark metallic purple-green or light metallic green (Figs. 5–6, 9–10)................................................................................. 3

3. Antennomeres 7–10 asymmetrical; elytra metallic green; tergite III medially with punctures and surface microsculpture and thus appearing dull........................................................................... Te. caterinoi

- Antennomeres 6–10 asymmetrical; elytra dark metallic purple; tergite III medially with reduced punctation or surface microsculpture and thus appearing glossy........................................................ Te. erithracus