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This is a very attractive 25 mm long weevil with dark head, thorax and elytra. Both elytra and thorax showed shallow pitting -on the elytra the pitting was slightly hexagonal in shape whereas on the thorax it was irregular (pic 4). Some of the pits were covered by dense short pale setae which appeared to be iridescent (pic 4). This gave the beetle a beautiful blue-green colour. Strangely, the colouring was more vivid in shade. The underside of the beetle also had setae which reflected similar colours.
Spotted on an acacia in a national park
We spotted three of these in the same area, two of which were on the same shrub.
The larvae of these weevils feed on acacia root while the adults feed on foliage.
The beetle is so named because it was collected at Botany Bay (Sydney) during Cook's voyage to Australia. It also happens to be one of the first Australian insects (collected in 1770) to be described scientifically.