Insects and Spiders - native

California Prionus Beetle (Prionus californicus) on Dec 27, 2024

Originally reported as unknown

Submitter has sample

Description of specimen

Round head boarer larva

Commentary

Thank you for your report! No action is recommended: that appears to be a larva of our native California Prionus. They feed in rotten stumps and downed logs of conifers. They are not tree killers.

Tom Valente
Jan. 8, 2025, 8:21 a.m.

Location

While digging out an old cedar stump in my back yard.

Expert Reviewer

Tom Valente
Oregon Department of Agriculture

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