Friday Beetle Blogging: Chlaenius ground beetle

Chlaenius sp. ground beetle, Urbana, Illinois

This colorful beetle came from our back yard.  It’s a ground beetle in the genus Chlaenius, recognizeable from its pubescent elytra and pungent defensive secretions.  Like most ground beetles, Chlaenius makes a living as a predator.

The beetle’s metallic sheen is not the result of a pigment but of fine microscopic sculpturing on the integument.  This is evident when the insect is viewed at a different aspect: notice how the color turns to green in lateral view:

The same beetle, in sideview.

photo details: Canon 100mm f2.8 macro lens on a Canon EOS 50D
ISO 200, f/13, 1/80 sec, indirect strobe in a white box

4 thoughts on “Friday Beetle Blogging: Chlaenius ground beetle”

  1. Oho! A multilayer reflector, very nice. Now you’ve got to get your hands on one of those loxandrines with diffraction gratings. 🙂

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