"Carabid beetles of the genus Platycoelus Blanchard, 1843 are found in Australia, New Zealand, New Caledonia and New Guinea, but are only frequently collected in Australia. There, in season, and often tied to substantial periods of rain, they can be extremely common at lights, particularly the easily recognized, metallic green P. melliei Montrouzier, 1860."

Downloadable reference:

Kipling WILL, "A taxonomic review, new species and a key to species of Platycoelus Blanchard, 1843 (Coleoptera: Carabidae: Pterostichini)".