Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
The pieces judiciously made no pretence to any grand or
really poetical effect: their charm resided primarily in furnishing
occupation for the intellect, not only through their subject-matter
--in which respect the newer comedy was distinguished from the old as
much by the greater intrinsic emptiness as by the greater outward
complication of the plot--but more especially through their execution
in detail, in which the point and polish of the conversation more
particularly formed the triumph of the poet and the delight of the
audience.
Complications and confusions of one person with another,
which very readily allowed scope for extravagant, often licentious,
practical jokes--as in the -Casina-, which winds up in genuine
Falstaffian style with the retiring of the two bridegrooms and of the
soldier dressed up as bride--jests, drolleries, and riddles, which in
fact for want of real conversation furnished the staple materials of
entertainment at the Attic table of the period, fill up a large
portion of these comedies.