Two Prionids: Brown Prionid and Broadnecked Root Borer

Subject: Beetle?
Location: Southern New Jersey
July 18, 2016 7:28 am
Dear Bugman, I recently had the pleasure of encountering several what I believe to be are beetles in our recently purchased home? At first I thought one was surely was a cockroach but after doing some research I believe it is a beetle. These beetles are huge, never seen before in my life here in New Jersey. Root Borer? Prionus? The 1st picture is what I surely thought was a cockroach and was found inside our home and we moved it outside. 2nd was found after dark walking along outside by our patio door. 3rd was one found outside our home in the early morning apparently dead. Thanks so much for your help!
Signature: Sincerely, Chuck

Brown Prionid
Brown Prionid

Dear Chuck,
Your first image, the beetle you mistook for a Cockroach is a Brown Prionid,
Orthosoma brunneum.  The second is a female Broadnecked Root Borer, Prionus laticollis.  Both are classified in the subfamily Prioninae, but they are in different genera.  Your third beetle is a male Reddish-Brown Stag Beetle.  We receive numerous identification requests for each of these three species every summer.  

Broadnecked Root Borer
Broadnecked Root Borer

Daniel, cannot thank you enough for taking the time for identifying them. Sorry they were so common, I’ve never seen a beetle that large in all my life, let alone few different species of something that large. Our home backs to the woods with lots of older some dead trees. Thanks again for your time and help!

Hi again Chuck,
There is no need to apologize.  It is nice being able to post new images of different species each year.

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