2. Middle and hind trochantelli with distal margin produced as acute curved tooth. Mandibles twisted about 90º (Costa Rica to southern Brazil).
1. Stauropoctonus bombycivorus
2. Stauropoctonus torresi_
3. Stauropoctonus torresi_
2’. Middle and hind trochantelli simple. Mandibles not twisted, or twisted < 20º.
1. Janzophion nebosus
2. Prethophion latus
future couplets
3. Vein r-rs of fore wing slender, ...
...
Prethophion
3'. Vein r-rs of fore wing basally ...
...
Janzophion
