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For Insects, Spiders & Their Kin
For the United States & Canada
Black Ground Beetle - Calathus fuscipes

Black Ground Beetle - Calathus fuscipes
Puyallup, Pierce County, Washington, USA
September 6, 2007
Size: around 14 mm
Reminds me of Poecilus?

Images of this individual: tag all
Black Ground Beetle - Calathus fuscipes Black Ground Beetle - Calathus fuscipes

You can see the setiferous punctures on the third and fifth striae pretty clearly.
As Peter pointed out, this doesn't look much at all like the type specimen of Poecilus cursitor

Moved from Poecilus cursitor.

from K.W. Will: "Probably Poecilus cursitor, ...
"...though 13 or 14mm would be 1-2mm larger than the BL reported by Lindroth."

Sorry, Lynette and Peter. I was so wrong. =v=

Moved from Calathus.

If so,
it would be a first for Washington in the 2012 catalogue.

This candidate for new WA record
needs a physical examination before entry to the post-2012 caraboid registry. In my opinion there are just too many uncertainties with the one distant habitus when considering Lindroth's key and the type Poecilus cursitor LeConte. So is this specimen available for expert examination?

p.s. I don't know why the link for the MCZ type "Poecilius cusorius" LeConte (original spelling) fails?

I was thinking if Lynette were to find similar looking carabids, they would be worth keeping. I have some new Utahn records btw, but I am waiting until I have a good camera and perhaps some more scope time before I submit them to the registry. Notiophilus aeneus and Anisodactylus consobrinus will both probably make the list in the near future.

I don't live in that area any longer.

"Candidate" list now added to the post-2012 Caraboid Registry
so posts like this one are not forgotten. Someone may come along later to convince us (with posted facts) that this image is indeed Poecilus cursitor. In this particular case, it might be worthwhile for authority Kip Will to weigh in again after so many years.

Poecilus cursorius type at


Moved from Ground Beetles.

maybe Calathus?
You can recognize it through its comb-like claws.

i concur

I don't see in image enlargement the comb structures on claws.
My monitor is not high resolution. Do you see them?

that tarsal picture is but a blur
however, the habitus looks distinct enough to me, and i would be highly surprised should this guy turn out not to be a Calathus

I don't think so
I've looked closely at the claws since reading your comment, and I'm adding another image. I don't think it has pactinate tarsal claws.

problems with Poecilus
Were I to scope above specimen, I would have no trouble deciding genus or even species. However, just having the image, "14 mm", and "Washington" makes identification difficult in this case. While the image could certainly fit genus Poecilus, the somewhat sinuate pronotum excludes larger P. lucublandus (9 - 14 mm) but not smaller P. scitulus (8.5 - 11.5 mm) and similar P. laetulus (9.5 - 11 mm). All three are known in Washington. Other possiblities I have not yet ruled out are moderatly large Pterostichus, or even Harpalus. Suggestions anybody?

Why don't I get the option to edit my previous comment?
Curiously, most of my other comments elsewhere in BG I can "edit" but not this one! I simply wanted to revise previous to include moderately large "Anisodactylus" along with "Harpalus" as another harpaline possibility for the given image. [P.S. I was able to edit this comment for a spelling error but still not the original comment. I'm sure there is a simple explanation for all of this. Last question: How best to do an automatic spelling check on BG comment before sending?]

Editting Comments
Once someone replies to a comment you no longer have the ability to edit it.

and I'm pretty certain on the size. I was using a ruler....may be off by a mm, but not by 2.5.