1	Profemoral interior lobes which are rounded without a sharp angle; mesofemoral interior lobes which are a large rounded triangle, reaching from end to end without prominent spination; (alae) the media anterior and the media posterior do no fuse, instead they both run to the wing margin, and the cubitus after splitting from the first anterior anal fuses with the media posterior near the wing margin and then they run fused to the margin as one; (stellae species group)	1
–	Profemoral interior lobe angular; mesofemoral interior lobes which do not reach from end to end of the shaft and have distinct serrate teeth; (alae) the media posterior fuses back to the media anterior before reaching the wing margin, and then the fused media runs on its own to the wing margin without fusing with the radial sector; (pygmaeum species group)	4
2	Mesopleurae with a single anterior tubercle, remainder lacking tubercles; tegmina longer (almost the length of the metathorax)	3
–	Mesopleurae with a prominent anterior tubercle followed by four additional small tubercles; tegmina shorter (only about half the length of the metathorax)	N.miyashitai sp. nov.
3	Exterior profemoral lobe smoothly rounded with an obtuse angle; abdominal segments with smooth edges creating a clean, spade-shaped abdomen	N.stellae
–	Exterior profemoral lobe slightly recurved creating an overall acute angle; abdominal segment V with two large clear spots; segments V–VII each with margins that extend and then contract creating a scalloped edge	N.larssoni
4	Alae completely transparent, not fully brown in color or with a brown band along the margin; tegmina transparent	5
–	Alae color either completely brown or with a transparent center and brown margin; tegmina completely brown	6
5	Profemoral interior lobe notably larger than the exterior lobe	N.asekiense
–	Profemoral interior lobe equal width to the exterior lobe	N.rentzi
6	Exterior profemoral lobe distinct, wider than the width of the profemoral shaft	7
–	Exterior lobe of profemora greatly reduced, not wider than the width of the profemoral shaft	N.australianum
7	Exterior profemoral lobe notably tapered on the distal and proximal ends; the interior profemoral lobe can be of the same size as the exterior lobe or larger than the exterior lobe	8
–	Exterior profemoral lobe only notably tapered on the proximal end, with the distal nearly reaching the end of the profemoral shaft; profemoral interior lobe always smaller than the exterior lobe	N.adisi
8	Alae almost completely brown, or completely brown in color	N.pygmaeum
–	Only the alae margin and sclerotized section brown, interior half of the alae transparent	N.hasenpuschi