I caught this beetle while blacklighting in Arizona, in July of 2009. Unfortunately, it was just a very nice male (so no reproduction). In the video, you can see a specimen of Chrysina beyeri that was eaten by the P. truncatus. The predator chewed a hole into the victim to feed.
(click the 480 pixel version of the video for higher quality)
http://www.youtube.com/user/bugsincyberspace#p/u/1/u9mWYNk1IrY
(click the 480 pixel version of the video for higher quality)
http://www.youtube.com/user/bugsincyberspace#p/u/1/u9mWYNk1IrY
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