The White-banded Dogwood Aphid (Anoecia cornicola) is an aphid that feeds on Dogwood (Cornus), the ones in this image they are feeding on Cornus alba. The winged form of Anoecia cornicola has a white band around the top of the abdomen, and a prominent black spot at the end of the principal veins. The cornicles in Anoecia cornicola are merely pores.
Left edge cropped off in ACR