Key to genera of the tribe Scaphytopiini (males) from China

1. Aedeagus with paired shafts, two gonopores.................................................... Japananus Ball

- Aedeagus with one shaft, one gonopore.................................................................... 2

2. Aedeagus and connective articulated...................................................................... 3

- Aedeagus and connective fused.......................................................................... 5

3. Valve and subgenital plates fused....................................................... Xenovarta Viraktamath

- Valve and subgenital plates not fused...................................................................... 4

4. Body bluish-green with linear red stripes. Male pygofer side with a ventral sclerotized and a dorsal membranous processes............................................................................................. Varta Distant

- Body ochraceous with brown areas on vertex. Male pygofer side with a ventroposterior process.... Grammacephalus Haupt

5. Aedeagus with a pair of ventral paraphyses................................................ Vartalapa Viraktamath

- Aedeagus with stout preatrium and platelike basal processes........................... Sikhamani Viraktamath & Webb