Cetonia aurata (Gouden tor (BE) / Green rose chafer (EN) / Goldglänzende Rosenkäfer (DE) / Cétoine dorée (FR) ) is a beetle of the Scarabaeidae family, 20 mm long (which is large for a Belgian beetle !), that has metallic green coloration (but can be bronze, copper, violet, blue/black or grey) with a distinct V shaped scutellum, the small triangular area between the wing cases just below the thorax, and having several other irregular small white lines and marks. The underside is a coppery colour. The metallic gold/green colouring of the beetle's surface is the reflection of mostly left circularly polarised light. When viewed through a right circular polariser, they appear to be colourless. Rose chafers are mainly found over southern and central Europe, in Belgium they occur locally.
Image: Viroinval (BE) - 14/07/2010
© Johan Dierckx
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