Subgenus Nectarosiphon

Apterous viviparous female: 1) siphunculi swollen 2) first tarsal segment formula 3:3:2, rarely 3:3:3 3) antennae reaching beyond the bases of siphunculi

Alate viviparous female: 1) siphunculi swollen 2) first tarsal segment formula 3:3:2, rarely 3:3:3 3) cross bars fused into a patch

First instar nymphs without spinules on hind tibiae