Key to species of Paracupta (Chalcotaenia) Deyrolle, 1864

1 Tarsi completely or partly yellow......................................................................... 2

– Tarsi completely metallic................................................................................ 4

2 Pronotum with five well developed longitudinal sulci......................................................... 3

– Pronotum with only medial sulcus well developed; intermedial and lateral sulci only very slightly indicated and reduced; dorsal side black-violet with green macropunctures; costae and intercostae weak but well developed; ventral side and legs dark green. Buru Is. Figs 54–57, 78..................................................... P . (C.) toxopeusi Obenberger, 1932

3 Ventral side light green with golden reflections, strongly shiny; dorsal side generally greener; ♀ ventrite V with broad (almost trapezoidal) notch (Fig. 40); parameres open from apical third (Figs 67, 68). Indonesia: Seram Is. Figs 40, 42–47, 67, 68, 78................................................................................... P . (C.) horaki sp. nov .

– Ventral side dark green, moderately shiny; dorsal side generally darker; ♀ ventrite V with small ‘U’ shaped notch (Fig. 41); parameres open from mid-length (Figs 69, 70). Indonesia: Bacan Is., Halmahera Is. Figs 41, 48–53, 69, 70, 78........................................................................................... P . (C.) laperousei sp. nov .

4 Pronotum with five longitudinal sulci; antennomeres III–XI brown or yellow...................................... 5

– Pronotum with three longitudinal sulci; antennomeres III–XI black; dorsal side brown-violet with green lateral parts and macropunctures of pronotum, and green intercostal areas; macropunctation of elytra fine, without metallic borders; ventral side and legs green. Australia. Figs 30–34, 65, 66, 74................... P . (C.) lamberti (Laporte de Castelnau & Gory, 1837)

5 Intercostae not developed or slightly indicated; macropunctures in intercostal areas joined, separated only on costae....... 6

– Intercostae well developed; macropunctures in intercostal areas separated; sulci on pronotum and intercostal areas green. Solomons: Guadalcanal Is., Malaita Is., Tulagi Is., Russell Is. Figs 24–29, 62, 63, 79................ P . (C.) jakli sp. nov .

6 Ventral side green..................................................................................... 7

– Ventral side brown-violet; sulci on pronotum and intercostal areas bronze. Solomons: Rennell Is. Figs 11–13, 79...................................................................................... P . (C.) rennelli Hołyński, 2014

7 Antennomeres III–XI yellow; ventral side dark green, moderately shiny; sulci on pronotum and intercostal areas green-bronze, dorsal side generally darker. Solomons: Santa Isabel Is. Figs 14–17, 64, 79............. P . (C.) isabellina Kerremans, 1900

– Antennomeres III–XI brown; ventral side light green with golden reflections, strongly shiny; sulci on pronotum and intercostal areas light green, dorsal side generally greener. Solomons: Ranongga Is., Rendova Is. Figs 8–10, 79..................................................................................................... P . (C.) gottwaldi sp. nov.