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Photo#502631
Tomonotus sp? - Tomonotus mexicanus - male

Tomonotus sp? - Tomonotus mexicanus - Male
Brown Canyon, Pima County, Arizona, USA
August 2, 2010
From the pronotum, this appears to be a Tomonotus sp., but it doesn't quite match any of the T. ferruginosus photos on Bugguide. It's hind femur is a strange shape too. Sorry about the limited depth of field on this image.

He looks just like the one I found there.
The best fit for now seems to be T. mexicanus. I think that T. mexicanus is a summer species, and T. ferruginosus a spring species. The two seem to behave differently, and the wings are (always?) a different color.

These look a lot like specimens I've seen from Mexico, but considering the distance between (and apparent lack of the species in between), it is possible we have an undescribed species in Arizona. However, I doubt it. I'm calling them T. mexicanus (with a tiny bit of doubt).

I suspect that the hind femur is more "lobed" near the rear of the top in males than in females. It seems to vary but to be stronger in males of the other species as well.
There are a few specimens posted under the other species that I think may belong here as well. Until your female a few years ago, I didn't have a clue to even look for two different species in Arizona, but with a little more practice I think I'll be able to tell them apart all the time (it appears that the pronotum is rougher and is shaped a bit differently in this species).

Moved from Tomonotus.

 
Nice
This is a male, right? It's nice to get a shot of a male too, although wish I'd gotten a better photo now.

 
I'm going to make an effort this year
to document this species in Arizona better. I know a few locations now, and a bit more about when ane in what habitat to look. It's always fun when another species is added to the national list, let alone to a state or county list. I wonder how many new ones you'll find this year? :0)

It seems I have a specimen in the freezer, also collected in August in Brown Canyon a few years back. It looks like T. mexicanus to me.

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