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Photo#709649
Carabus (Tanaocarabus) finitimus Haldeman - Carabus finitimus

Carabus (Tanaocarabus) finitimus Haldeman - Carabus finitimus
Austin, Travis County, Texas, USA
June 12, 1978
Carabus (Tanaocarabus) finitimus Haldeman
Det. per unsigned det. label attached to spmn coll. in 1927...
(Spmn shown coll. in 1968)

Spmn in the UTIC

Images of this individual: tag all
Carabus (Tanaocarabus) finitimus Haldeman - Carabus finitimus Carabus (Tanaocarabus) finitimus Haldeman - Carabus finitimus

How do you differentiate C. f
How do you differentiate C. finitimus from C. sylvosus besides range. I'm looking at specimens from western Arkansas, and while C. finitimus hasn't been recorded from here it's rather close to the localities in KS and OK it has been collected.

 
From the original description
From the original description (Haldeman 1852, in Stansbury 1852):
"Allied to C. sylvosus, but somewhat wider. Blank [sic?] slightly bluish on the margin. Prothora [sic], less narrowed behind than in sylvosus, with the reflex margin and that of the elytra wider. Elytra more convex, very shining, finely punctured in lines, with three rows on each of distant [distinct?] impressed foevae. Destitute of the scabrous appearance of C. sylvosus. Fort Gates.

 
I tried to indicate the shaky nature of the det...
C. sylvosus (Say) is much more widely dist. and I'm not an expert on either spp. (or carabids in general). You're welcome to visit or potentially borrow the spmn to check it out...

awesome addition, disticntive native beetle; thanks again, Mike
this takes care of the Carabus, too.

Cool
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