Strophosomus.
Swallow.
Swammerdam, Jan.
Syritta perpens.
Syrphus.
Tachytes (see also Mantis-killing Tachytes and the varieties below).
Tachytes anathema (see Anathema Tachytes).
Tachytes nigra (see Black Tachytes).
Tachytes Panzeri (see Panzer's Tachytes).
Tachytes tarsina (see Tarsal Tachytes).