Pacific Northwest backyard visitor
July 17, 2010
Location: Pacific Northwest – North Seattle
Love your site.
Found this guest hanging on my doorjamb when I took the trash out the night before. When disturbed, he hissed. Came out the next morning and he was still there. I browsed your and other sites, but couldn’t come up with anything that quite resembled him. I also can’t seem to find any antennae – perhaps that’s why he’s still hanging around?
What is he?
Your beetle is a Ten Lined June Beetle, Polyphylla decemlineata, or a closely related species in the same genus. The antennae of this species are actually quite spectacular, though the individual in your photograph has not unfurled its antennae to their full extent. You can see a nice photo on BugGuide of a Ten Lined June Beetle displaying its antennae.