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Photo#275258
Bombadier beetle - Brachinus
Copyright © 2009 margarethe brummermann

Bombadier beetle - Brachinus
Picture Rocks, NW of Tucson, pima County, Arizona, USA
May 9, 2009
Size: 9mm
Contributed by margarethe brummermann on 13 May, 2009 - 8:50pm
Last updated 19 May, 2009 - 6:07pm

Brachinus.
Possibly one of the larger species based on prominent elytral ridges seen here. Body length?
… Peter Messer, 14 May, 2009 - 8:34am

 
9 mm
added size
… margarethe brummermann, 14 May, 2009 - 12:52pm

 
Smaller than I thought.
Regardless of geographic area, almost all Brachinus need to be run through key under scope for reliable species determination.
… Peter Messer, 15 May, 2009 - 6:45pm

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