related to
N. nigripennis but is readily distinguishable by its transversely oval pronotum, totally black or fuscous abdominal sterna, and eastern distribution. In addition the males usually have a median tuft of hair in the punctulate depression on the third, fourth, and fifth abdominal sterna while in
nigripennis these usually occur only on the fourth and fifth abdominal sterna. The females have longer erect hairs on the fore tarsi than do the females of
N. nigripennis.
(2)