Question about Scansion

[Lysandra]

Saluete omnes,

I just started reading some Roman poetry this semester, but it’s been a few months since I did any scansion and I’m a bit confused about one thing. I read that a final -us is usually short by nature. So in the following examples, both taken from Propertius 1.3, are the -us syllables both short? Before I reviewed that page I had been marking them as long.

Cynthia non certis nixa caput manibus

hac Amor, hac Liber, durus uterque deus

Thanks for any help.

 

[Etaoin Shrdlu]

So in the following examples, both taken from Propertius 1.3, are the -us syllables both short?

Yes.

 

[Lysandra]

Thanks.