Origin of wings, [206]

Orl-fly, [445]

Ormerod, Miss, on importation of locusts, [299]

Ornament, [200], [215], [233] f., [243], [244], [282], [302], [313], [339]

Orphania denticauda, [321]

Orthodera ministralis, [249]

Orthoderides, [251], [259]

Orthophlebia, [453]

Orthoptera, [172], [198]-[340], [407]

Oryssidae, [506]