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Found a possible California Root Borer Beetle in my basement #798806

Asked June 30, 2022, 1:11 PM EDT

Hi there, This morning while I was in my basement doing my weekly spot checks, I saw a dead bug on its back that was much larger than I’m used to seeing here in my Lakeside yard. I used the Seek app on my phone and it identified it as a California Root Borer Beetle (Prionus californicus). Digging further (ugh, a pun), I saw that those specific beetles aren’t found east of the midwestern states. Figured if this is indeed a California Root Borer that I might be one of the first in Virginia to spot one. I have it kept in a ziplock bag surrounded by foam to protect it from getting crushed. Happy to drop it by the Henrico Extension Office for you to check it out, if you’d like. Thanks!

Henrico County Virginia

Expert Response

Thanks for contacting us, that is actually Prionus imbricornis, the Tile-horned Prionus, a native insect that breeds in stumps and tree roots. See:  https://bugguide.net/node/view/3143
An Ask Extension Expert Replied June 30, 2022, 3:20 PM EDT

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