What's That Bug? does not endorse extermination

May 22, 2011
In preparing for the PowerPoint lecture at Theodore Payne Foundation next weekend, we came to the realization that there are no generic Ground Beetle photos from Southern California on our site, hence there is no image to use in the presentation.  We grabbed the digital camera and turned over some wood in the garden without any luck, but when we turned over a slab of concrete, about 15 ground beetles started to scurry about.  We captured two in a container and took a few quick photos.  We believe, according to Charles Hogue in Insects of the Los Angeles Basin, that these are Black Ground Beetles,
Pristonychus complanatus.  Hogue writes that they are “the largest of the ground beetles listed here (5/8 in or 10 mm), this species is all black and has a narrow prothorax,  The front of the head is flat and protruding.  The Black Ground Beetle was introduced into the basin, but coleopterists (beetle specialists) are not sure of its origins.”

Black Ground Beetles

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What's That Bug? does not endorse extermination
Location: California

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