Can someone please tell me what the little notes (4 bars after C) are called?
2 Answers
These are called "cues" and they show you what other instruments are playing while you have rests. They are normally placed right before an entrance, particularly after a long section of not playing, so that you can be sure of when to come in.
"Tromb. e Tuba" means that these notes are being played by the trombone and tuba. (The markings in this music are in Italian.)
They're cue notes. Notice the "Tromb.e Tuba" below them, indicating that the trombones and tuba(s) are playing those. It's there to reassure you that you've counted the rests properly.