Tracheal syrinx, [22]

Trachelotis, [260], [262];

T. caerulescens, [262]

Tracheo-bronchial syrinx, [22]

Tracheophonae, [466], [483]

Tracheophones, [466]

Trachycomus, [505]

Trachyphonus, [450];

T. cafer, [450] f.;

T. margaritatus, [451]