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Photo#535876
Riparian Carabid - Pericompsus laetulus

Riparian Carabid - Pericompsus laetulus
San Pedro River, Cochise County, Arizona, USA
June 24, 2011
Size: 3 mm
Found it on my shirt while I was out looking for Carabids!

Moved
Moved from Bembidiini.

Pericompsus laetulus LeConte
based on my microscopic examination of this specimen (marked "EKM30") which is now a photo-voucher in the P.W.Messer collection. Thanks Eric for correcting the label mixup. This species is new to both BugGuide and my collection.

Range: AZ, NM (allopatric in relation to common eastern P. ephippiatus).
Southwestern P. sellatus is larger and has pronotum more strongly constricted at base.

Corresponding specimen BG # 535876 received
appears different from image. Most notably head & pronotum appeared quite dark and I measured body length to be 7 mm. I'm not convinced image is even genus Bembidion. The mailed specimens (this one marked #EKM29 plus a second non-imaged #EKM21) are clearly the southwestern species Bembidion perspicuum LeConte recently resurrected by Maddison as valid in ZooKeys (2010).

At any rate, thanks Eric for two specimens that fill a species void in my reference collection.

 
must be a typo on the spreadsheet
I have two more specimens that correspond to B. perspicuum and they're definitely not the one pictured here. This one should have been sent to you, I believe it is actually the one labeled EKM30. Sorry again, I think I assembled the spreadsheet a bit too hastily!

Moved
Moved from Ground Beetles.

I'll have to wait for Peter's magic on this one

 
very wise of you

Paratachys or close kin, i presume

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