Termites, [389];
Thysanura, [196];
Myriapods, [72] f.;
Palaeozoic Neuroptera, [343]
Founding communities, [381]
Fourmilions, [456]
Fowl, biting-louse of, [350]
Fritze on Ephemerid alimentary canal, [439]
Frons, [94]
Front wings absent, [260] f.
Termites, [389];
Thysanura, [196];
Myriapods, [72] f.;
Palaeozoic Neuroptera, [343]
Founding communities, [381]
Fourmilions, [456]
Fowl, biting-louse of, [350]
Fritze on Ephemerid alimentary canal, [439]
Frons, [94]
Front wings absent, [260] f.