Caterpillar ID, in Virginia, on Meadow Rue

[David Hamilton Cox]

 Can anyone identify this species, seen feeding on early meadow rue
(Thalictrum dioicum) in a woodland setting in Virginia? I've seen 
several of them recently. I tried to rear the first one but couldn't
find a leaf it liked, saw another one days later actively feeding
on the meadow rue. I'm assuming it's a moth since I couldn't find it
in my new butterfly caterpillar guide, nor meadow rue in the host plant
index to the Audobon butterfly guide. (it was a little over an inch long).

http://www.nyx.net/~dhcox/cat1.jpg
http://www.nyx.net/~dhcox/cat2.jpg
http://www.nyx.net/~dhcox/cat3.jpg

 Thanks in advance for any ideas.

-David Cox 


 
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