What's That Bug? does not endorse extermination

Subject: Huge beetle with pinchers
Location: Hockessin, DE
June 21, 2015 7:03 pm
Hi WTB!
We found these two lovely specimens on our screen door at about 10pm on a very humid summer night in the woods of northern Delaware. Aren’t they incredible?! We’ve seen a lot, and I mean a lot, of cool bugs since we moved here. But we never expected anything like these guys. The big one is a good 2 inches from head to butt. When they were agitated they spread out their pinchers (mandibles?) like they were ready for a fight. We didn’t bother them long though, and released them back into our yard. So, what are they?
Signature: Polly

Two Male Stag Beetles:  Reddish Brown Stag (left) and Dorcus parallelus (right)

Two Male Stag Beetles: Reddish Brown Stag (left) and Dorcus parallelus (right)

Dear Polly,
We have been away from the office for a few weeks and we are currently sifting through all the mail that arrived, choosing the best submissions to post.  We are very excited to post your images of two different species of Stag Beetles, both males.  The smaller Stag Beetle which we identified on BugGuide is
Dorcus parallelus, and it has no common name.  According to BugGuide:  “Larvae feed in decaying stumps and roots of oak, linden, and maple” and “readily comes to lights.”  This species was not until now represented on our site. 

Dorcus parallelus Stag Beetle

Dorcus parallelus Stag Beetle

The larger individual is a Reddish Brown Stag Beetle, Lucanus capreolus, and according to BugGuide:  “Eggs laid in rotting wood. Larvae take two years to develop, pupate in nearby soil.”

Reddish Brown Stag Beetle

Reddish Brown Stag Beetle

What's That Bug? does not endorse extermination
Location: Hockessin, Delaware

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