Insects and Spiders - native

California Prionus Beetle (Prionus californicus) on Aug 3, 2020

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

Submitter has sample

Description of specimen

This beetle is 2 and 1/2 half inches long by 3/4 inches wide. Its brown and fury under side. Long anteena and long legs with large pinchers. Google says it could possibly be a titan beetle.

Commentary

Dear Kris, this is (likely) a female California Prionus, Prionus californicus looking at the antenna. California Prionus grubs feed on partially decayed wood, especially conifer stumps. They will not attack structural timbers or buildings. These large beetles are not commonly seen, because the adults are active at night. They are occasionally attracted to porchlights as this one probably was. Thank you, Helmuth Rogg

Helmuth Rogg
Aug. 3, 2020, 12:55 p.m.

Location

Forest grove at vandervelden apartments on Pacific Ave. Across from Safeway.

Expert Reviewer

Mr. Helmuth Rogg

© 2024 Portland State University | Contact us for questions regarding site content