Forel on nervous system of ant, [495]

Forficula auricularia, [202] f., [204], [209], [211];

F. gigantea, [210]

Forficulidae, [201], [202]

Formica-leo, [456]

Formicajo, [456]

Formicario, [456]

Fossil, Insects, [178], [472], [485], [486];

Acridiidae, [308];

Blattidae, [238];