Key to the Chrysodema (C.) aeneoviolacea species-group

1 Dorsum dark bronze brown.............................................................................. 2

- Dorsum metallic green................................................................................. 4

2 Frons densely pubescent with long setae. Pronotum coarsely and densely punctate, principal impressions hardly visible, narrow and very shallow. Philippines. Figs 34–36, 80...................................... C . (C.) sibuyanica Fisher, 1924

- Frons sparsely pubescent with short semi-adherent setae. Pronotum coarsely and moderately sparsely punctate, principal impressions obvious, moderately impressed. Species from Moluccas ............................................... 3

3 Dorsum strongly shiny, costae on elytra polished, not obviously micropunctate. Dorsum usually bronze-brown, pronotum often with slight violet tinge. Indonesia, Kai Isls., Larat Is. Figs 25–30, 78................ C . (C.) aeneoviloacea Deyrolle, 1864

- Dorsum moderately shiny, costae very distinctly and densely micropunctate. Elytra distinctly bicoloured, costae in dark tones of turquioise or blue with golden intercostal depressions. Indonesia, Haruku Is. Figs 31–33, 79........ C . (C.) dany sp. nov.

4 Third costa shortened, reaching approximately to midlength of elytron, sometimes it continues as low fold but always densely punctate, not smooth. Indonesia, Ambon Is. Figs 37–39................................ C . (C.) excellens Théry, 1923

- Third costa long, reaching distinctly at least to apical third, smooth and strongly shiny along entire length............... 5

5 Principal impressions on pronotum regular, large and cup shaped, entire concavity densely covered with small punctures. Indonesia, Ambon and Seram islands. Figs 43–48, 81................................... C . (C.) wallacei Deyrolle, 1864

- Principal impressions on pronotum never cup shaped, moderately deep and irregularly circular to oval with stripe of dense and small punctures internally. Indonesia, Gorong and Seram islands. Figs 40–42........... C . (C.) mniszechii Deyrolle, 1864