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For Insects, Spiders & Their Kin
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Photo#139539
Caterpillar - Harrisina americana

Caterpillar - Harrisina americana
Elysburg, Northumberland County, Pennsylvania, USA
August 24, 2007
Haven't been able to find a match to this critter although I feel it's a moth caterpillar of some type. This is the first one I've seen this season.

Makes us think of
Harrisina americana - Grapeleaf Skeletonizer - Hodges#4624 in the guide here. Is it feeding on grape?

 
yes
it did appear to be on a grape leaf and the guide image looks correct. Thanks for the ID, Folks.