Anterior margin of T2 emarginate (Fig. 72, 74, M12, M14); notaulices absent or weak and incomplete, never percurrent (Fig. M7-9); macropterous (p.16)
Anterior margin of T2 incised (Fig. M20, M22, M24); notaulices present, sometimes weak but percurrent in all except micropters (Fig. M19, M21, M23, M28, M30, M32); macropterous, brachypterous, or micropterous