False Bombardier
Galerita atripes
Active at night in ponderosa woodland at Washington Park, Gila Co., Arizona. 8 Aug. 2015.
Carabidae -- Ground Beetle Family
These quick cursorial insects hunt and forage for food at night. If molested they can release a pungent quinone chemical from their abdomen, but unlike true bombardier beetles the compounds do not react and release heat. Also, true bombardier beetles tend to live close to water whereas Galerita are not tied to inhabiting that very wet zone.