Subject: Black Beetle in Texas
June 17, 2016 6:35 am
I saw this beetle in April 2011 in Texas in Kickapoo State Park. It was 2-3 inches long, a big beetle.
What is it?
We were able to identify quickly this Fierce Ground Beetle in the genus Pasimachus on BugGuide. According to BugGuide, Fierce Ground Beetles eat “caterpillars, other larval insects.” Based on your location, we believe you have either Pasicachus californicus which according to BugGuide, their range is: “AZ-TX-NE-UT / Mex. (does not occur in CA)” or Pasimachus depressus which according to BugGuide is “Noted from Carolinas, Oklahoma. Internet references suggest it is found west to Arizona” and described as “Large, black, elytra and pronotum often bordered with blue/violet. Elytra of male shiny, of female dull, neither have striations or punctures. Base of pronotum (next to abdomen margined). Hind tarsus long and slender.”
It was the biggest beetle I ever saw in the us that wasn’t in captivity.