Fertonius luteicollis, [130]

Fever-fly, [477]

Filaria, and Mosquitos, [468]

Filicornia, [200]

Finding nest, [38] f., [126]

Finn, on protected butterflies, [345] n.

Flagella, [384], [442]

Flatides, [576]

Flax-seed cocoon, [460]

Fleas, [522] f.