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Beetle 06.17.2009 017 - Heterachthes quadrimaculatus

Beetle 06.17.2009 017 - Heterachthes quadrimaculatus
Moccasin Lake, Winston, Douglas County, Georgia, USA
June 16, 2009
When I first saw this beetle, I thought it was another Heterachthes quadrimaculatus, that I had just photographed a few minutes earlier. However, upon examining the photos, the difference was readily apparent. Again I need help with the ID on this beetle. Attracted to light.

Moved from Longhorned Beetles.

Found a page that shows the
two different kinds of antennae here

This one looks all hairy
just like Heterachthes quadrimaculatus. So we would say this one is correct. Your recent image looks very different to us with smooth antennae and large segments. Doesn't seem like that could be a simple gender difference. We'll ask Dr Thomas to reconsider or explain on that one.

Thank you
I don't know if it is a gender difference or not. The one thing that keeps in my mind is that they both showed up at the same time on my patio glass door and they were about a foot apart form each other. In the dark I thought they were the same species, but after I looked at the photos I could tell there was a difference. I take photos of just about every insect I see for that reason. It's a lot of photographs, but that's what the delete button is for after I examine them.

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