Diptera, [458];
Hemiptera, [542];
Thrips, [531];
Wasps, [88]—see also Palaeozoic
Fossores, [7], [10], [90] f., [346];
classification, [93]
Fossorial solitary wasps—see Fossores
Founding new nests, Ants, [145] f.
Frenulum, [316], [318], [319], [400]
Friederich, on Parnid larvae, [244]