Gyrostoma species. 1–3 Polistes gigas 1 female head, frontal view 2 male head, frontal view 3 antennal flagellomeres 1–4. 4–6 Polistes olivaceus 4 female head, frontal view 5 male head, frontal view 6 antennal flagellomeres 1–4. 7–9 Polistes rothneyi 7 female head, frontal view 8 male head, frontal view 9 antennal flagellomeres 1–4. 10–12 Polistes tenebricosus 10 female head, frontal view 11 male head, frontal view 12 Antennal flagellomeres 1–4.