Solenopsis fugax, [137]
Solitary wasps—see Fossores and Eumenidae
Song, of Cicada, [572]
Soronia, [232]
Sound-organs, [448];
of Ageronia, [354];
of Hecatesia, [371];
of Cicada, [573], [574]—see also stridulating organs
Sound-production, [155], [156];
by Aegocera, [411];