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Coleoptera ( Malachius bipustulatus)

Observed: 20th June 2012 By: MickETalbotMickETalbot’s reputation in InvertebratesMickETalbot’s reputation in InvertebratesMickETalbot’s reputation in InvertebratesMickETalbot’s reputation in InvertebratesMickETalbot’s reputation in Invertebrates
Coleoptera  Malachius bipustulatus b
Coleoptera  Malachius bipustulatus
Description:

Quote Charlie Barns
....normally hidden balloonlike structures on the undersides of the prothorax and abdomen that expand like air bags. They are thought to be scent organs that produce odors to deter would-be predators" (Introduction to California Beetles, Evans & Hogue)
Unquote.
Me, I thought mites when I first saw it with the naked eye. My thanks to Charlie for the enlightenment...

Identifications
Species interactions

No interactions present.

Species with which Malachite Beetle (Malachius bipustulatus) interacts

Comments

Rob Coleman's picture

Another explanation for these

Another explanation for these structures (sometimes referred to as 'cocardes') is that they are used in mating - I've seen these beetles inflate them during a protracted courtship (which occurs in other species in this genus).

Rob Coleman