large striped beetle
Tue, Jun 9, 2009 at 11:17 AM
this beetle, probably a bit more than two or three inches was in our garage. He was struggling on his back. When I tried to turn him over, he hissed at me. I finally picked him up and put him out in the front yard. Can you tell me what he is?
Marble Falls, Texas
This is one of the Lined June Beetles in the genus Polyphylla, probably Polyphylla occidentalis, though species identification may be difficult. There are numerous matching images posted to BugGuide. The genus page on BugGuide indicates: “Food Adults feed on tree foliage, thus sometimes called ‘chafers’.
Life Cycle Eggs are laid on soil near host plants. Larvae hatch, burrow down and feed on roots of shrubs, trees, require 2-3 years to reach maturity. Pupation is in underground chambers. Adults come to lights. ” These beetles make squeaking noises when handled.