Insects and Spiders - native

Ponderous Borer (Trichocnemis spiculatus) on Aug 17, 2016

Originally reported as Insect or Spider (unknown species) (various)

Submitter has sample

Description of specimen

3.5 inch long. 6 leggedinged. Giant antennae. I think it was a Derobrachus geminatus.

Commentary

Dear Deva,
it looks like Derobrachus. It is a native wood borer.
Thank you and best regards,
Helmuth Rogg, Oregon Dep. of Agriculture

Helmuth Rogg
Aug. 24, 2016, 1:09 a.m.

It is actually Trichocnemis spiculatus. Mr. Rogg agrees.
I originally thought Prionus.

Dominic Maze
Aug. 25, 2016, 9:44 a.m.

Location

I found a Derobrachus geminatus yesterday. I think a car had run over it. I saw it i the parking lot of the laundry mat. I also found a live one in a friends backyard off horn rd and river rd last month. I put it in the freezer. But i believe it was about 36hrs old.

Expert Reviewer

Mr. Dominic Maze

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