False Bombardier Beetle

Is this a blister bug?
Fri, Apr 10, 2009 at 10:08 PM
Hello: I live in close proximity to the Chattahoochee river in NE Georgia. this is the second of these bugs that have made it into my house. I have not seen any in the yard, but I have not searched. 3/4 in. long, head to abdomen.
NE Georgia

False Bombardier Beetle
False Bombardier Beetle

Hi Michael,
This is a False Bombardier Beetle, probably Galerita bicolor. You can compare your image to photos on BugGuide. False Bombardier Beetles are predatory ground beetles and they will not harm your home bug BugGuide indicates this “Caution: This genus has chemical defenses, see Defensive production of formic acid (80%) by a carabid beetle : Proc Natl Acad Sci U S A. 1997 June 24; 94 (13): 6792–6797. “

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