is my revised identification after I examined and determined an example of B. egens taken by Tom from a nearby site in AZ. Accepting this species nicely addresses my concern about the pale elytral pattern discussed below. Pale pattern of image does indeed better fit B. egens than B. fortesriatum. It appears that my cleaning process in ammonia solution may have darkened this specimen. Also initially misleading is the fact that this species and closely related B. nogalesium both have linearly convergent frontal furrows, but not so strongly convergent as in B. fortestriatum. Bembidion egens Casey, 1918 is reported only from AZ & NM. For me it is a species difficult to distinguish from very similar AZ-MX species B. nogalesium Casey, 1924 based on little more than my review of the original taxonomic accounts by Casey. Sadly, I am not aware of any modern key that compares these two species. Also I found no other images on internet. According to my interpretation of the Casey descriptions, here are some criteria that might be useful for separating B. egens from B. nogalesium : Elytra with more distinct pale pattern and weaker impressed elytral striae; Pronotum base somewhat broader, with parallel hind angle section longer and with weak but distinct carinae. Corrections and/or further insights from others would be appreciated. Thanks Tom for providing the specimen.

Moved from Bembidion fortestriatum.
Peter, I moved this one per your email. Thanks!

The pale area on the left edge of the elytra is just a reflection. I have one other picture of this beetle, and there's no light area on the elytra. I'll post that one when I get a chance. Thanks Peter.

tentatively based on my microscopic examination of this specimen. There was only one Bembidion inside the container for this collection event. It fairly well keyed out to B. fortestriatum. However the corresponding image here unfortunately shows almost no detail to support my determination. Somewhat bothersome to me is that this image, unlike the actual specimen, shows more pale areas on elytra than should be for this species. Rather than suggesting another specimen, this is probably just an optical illusion. B. fortestratum was not given AZ status in the 1993 catalog by Bousquet & Larochelle. However in 2005 Maddison reported it in Greenlee Co, AZ adjacent to Graham Co noted here. Maddison's two photos were taken under diffused light to highlight structure while diminishing true color and luster. A new species for me. Thanks Tom.

I saved all the Carabids for Peter Messer to identify under a microscope.

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