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A bristly rose slug (Cladius difformis) chews through a leaf. This insect is the larva of a sawfly in the diverse family Tenthredinidae. Urbana, Illinois, USA
Black-headed Ash Sawfly - Tethida barda Urbana, Illinois, USA
Black-headed Ash Sawfly - Tethida barda

Urbana, Illinois, USA
Black-headed Ash Sawfly - Tethida barda Urbana, Illinois, USA
Black-headed Ash Sawfly - Tethida barda

Urbana, Illinois, USA
See photo in original gallery.
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all images and text © Alex Wild 2001-2013