I agree with Bob on this one...you seem to have a spicebush here. I posted a photo yesterday of a female dark form of eastern
, and you can see her solid black abdomen, and the difference in the spotting pattern-also, dark form eastern often still has a bit of the veining still visible--if you look at my photo, you can can see this on the underside of the forewing.

Nina:
Thanks so much to you (and Bob) for the ID help. I can clearly see the differences in abdomen spotting, and in comparing your photo specimen with mine, I can also clearly see that my specimen is darker, without clearly visible veining as present in yours. However I am still struggling on the red spotting pattern difference. One guide (Tilden/Smith Peterson guide) notes the placement difference of the orange spot on the base of the HW. Is this what your referring to? Are there any descriptive drawings that show higlight these differences? Many thanks, Scott

Scott, maybe you can see the missing orange spot on this photo from my website http://www.pbase.com/rcm1840/image/47249759
Notice the third space up from the bottom in the row of large orange spots, the spot is either very small or missing. That is the one characteristic to look for on a Spicebush. On your photo the spot is missing altogether.

That now makes a lot of sense! Too bad the field guides I used didn't make much mention of this, that, plus the abdomen spotting, seem so obvious now! Many thanks! Scott