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Beetle IMG_1715 - Platydema excavatum - male

Beetle IMG_1715 - Platydema excavatum - Male
Pymatuning Reservoir, Crawford County, Pennsylvania, USA
July 13, 2012
Hydrobius fuscipes? Feel free to frass.

Moved from Beetles.

From the looks of the antenna
From the looks of the antennae this is no hydrophilid..probably a teneb of some kind..Platydema?

I'm pretty sure your right. It looks a lot like Platydema americanum. Should I move it to genus, family, or just frass it? I'm fine with frass if it has little value.