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Milkweed Longhorn - Tetraopes melanurus

Milkweed Longhorn - Tetraopes melanurus
Hill Forest, Flat River Trail, Durham County, North Carolina, USA
July 8, 2005
Size: 10 mm
Found on what was may have been Common Milkweed, Asclepias syriaca, though the flowers had been eaten off. (I'm still not sure about this--could have been Dogbane, Apocynum. I think it was not Butterfly-weed, Asclepias tuberosa,which is supposed to be the hostplant for this species, but perhaps I err.) The beetle fell to some other vegetation while we were attempting to photograph it. Later captured, measured, and photographed.

See guide page for identification references--the pattern on the elytra is distinctive. Dorsal view of that distinctive elytral pattern. Note also the entirely black antenna, a trait shared with the similar, and more common, Tetraopes tetraophthalmus:

Image updated 7/14/19.