Tribe Nyssonini


1 Hindtibia with teeth or stout spines along posterior surface

 

Zanysson

 

1 Hindtibia with hair and bristles only on posterior surface

2

 

2 Posterior margins of terga simple, not thickened or double edged

3

 

2 Posterion margins of terga thickened and double edged, at least dorsally

4

 

3 Forewing with only two submarginal cells

 

Hyponysson

 

3 Forewing with three submarginal cells

 

Nysson

 

4 Media of hindwing diverging at cu-a; posterior tergal margins gradually thicker toward dorsolateral edges

 

Synnevrus

 

4 Media of hindwing diverging well beyond cu-a

 

Epinysson

 

Key Main