Psyllipsocidae Kolbe 1884

Key to the genera of Psyllipsocidae (for winged groups) 1. Hind wing absent..................................................................................... 2 - Hind wing present..................................................................................... 5 2. Forewing apex pointed................................................................................. 3 - Forewing apex rounded....................................................................... Globopsocus 3. Forewing veins well-developed, at least seven veins reaching wing margin (R 1, Rs, Ml, M 2, Cu 1, Cu 2, A 1)...... Psocathropos - Forewing veins reduced, fewer than seven veins reaching wing margin........................................... 4 4. Forewing Sc reduced.......................................................................... Dorypteryx - Forewing Sc not reduced.................................................................... Pseudorypteryx 5. Radial cell closed; pterostigma present.................................................................... 6 - Radial cell absent; pterostigma absent..................................................................... 7 6. Radial cell six-angled; pterostigma quadrangular................................................... Psyllipsocus - Radial cell five-angled; pterostigma triangular....................................................... Khatangia 7. Forewing veins not parallel............................................................... Libanopsyllipsocus - Forewing veins nearly parallel................................................................ Concavapsocus