Adults: With or without wings. If wings present, forewings typically leathery or hard basally and translucent and flexible apically. Nymphs: With or without wing pads. Segmented legs present. Mandibles hidden within needle-like beak in adults and nymphs.
Antennae longer than head and conspicuous in dorsal view. If wings present, membrane without distinct, similar cells defined by wing veins. Claws of at least front tarsi arising before tarsal apices. Hind femora much longer than abdomen.