A new species for What’s That Bug? Prionus fissicornis

Subject: Large brown beetle
Location: Linton, North Dakota
June 18, 2016 9:45 pm
Linton ND June 18, 2016 10pm. Large brown beetle close to a shop light laying on the ground.
I’ve never seen a beetle this large in ND before. I’m just wondering what it was. It was about 1.5″ long with fuzzy “feelers” that were about an inch long each.
Signature: Eric Jensen

Prionus fissicornis
Prionus fissicornis

Dear Eric,
This is one of the Root Borers in the genus Prionus, and though we have countless examples on our site, we are thrilled that we have identified your individual on BugGuide as Prionus fissicornis because it has so many segments on its antennae.  According to BugGuide:  “ant[ennae] w/ at least 25 antennomeres (‘antennal segments’), often over 30.”  Your individual is a male.  BugGuide also notes:  “Larvae are root feeders on grasses” and “Adults active May-July.”  Beetles in the Bush has an entertaining account on this species.  Your submission represents a new species for our site.

I’ll try to get a better picture of one for you with our 35mm camera. It should be way clearer than the first picture I sent.
Thank you very much for replying. I appreciate it!
ERIC JENSEN

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