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Identification Challenge #3 Reveal

Chris Grinter agrees with me that this photo is of a sawfly in the genus Dimorphopteryx.

June 6, 2010 | Twelvestones, Roswell, GA, USA

I first saw some photos of similar sawflies in this book:

Insects:
Their Natural History and Diversity
by Stephen A. Marshall

I then found some images on BugGuide.

It really is an odd looking critter. If I’d instead shown this view, it would have been more obvious, I think, that it’s a sawfly.

Side view

Here you can see the horns just behind the head.

Closeup of head

Marshall reports that the “tubercle behind the head is eversible, and sticks out like a snake’s tongue when the insect is disturbed.” Cool. I wish I’d known that when I encountered it. I would have tried to coax it into displaying that behavior. read more

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