So the list of defunct (post WW-II) national flag carriers grows with the demise of Alitalia last week.

That list now also includes:
Malev
Cyprus Airways
SABENA
Swissair
VIASA
PLUNA
AeroPeru
LAB
LAP/LAPSA

Not sure if VARIG and Mexicana count

Any missing?

Excluding airlines where someone else picked up the bones and resumed operations under the same name and IATA code, and airlines where a divided country was reunified (e.g., Air VietNam, Interflug), or a once-unified country or multi-nation airlines was split apart (e.g., JAT, CSA, MSA)