Venation:
- both wings quadrifid
- FW M1 stalked with R5: (R4 (R5, M1))
- FW: no anal vein fork at base
- FW: R2 R2 stalked from cell
- HW SC curved and almost touching R or connected with it by a bar, thus forming a precostal cell

-Palpi porrect and generally large

- proboscis absent

- antennae bipectinate in both sexes

- frenulum absent