rei subsellium: the defendant's bench; cf. Cael. ap. Cic. Fam. 8.8.1 “invocatus ad subsellia rei occurro.” Egnatius was one of the friends gathered (advocati) to lend the defendant their support at the trial, and ought to have assumed the expression of countenance that would have accorded with the pathetic character of the counsel's speech and have aided in influencing the judges,—but he grins.
 lugetur: he is one of the friends attending the funeral, and should of all men show in his face his sympathy with the bereaved mother,—but he only grins.
 monendum est te: this impersonal construction of the neuter gerundive of a transitive verb with a direct object occurs only once in comedy ( Pl. Trin. 869 “mi agitandumst vigilias” ), but is fairly common in Lucretius and Varro, though nowhere found in Caesar. It rarely occurs in Cicero and in the Augustan and later writers.
 bone: this vocative is generally used ironically, in more or less mild disparagement; cf. Ter. Andr. 616 “eho dum bone vir, quid ais? viden me consiliis tuis miserum impeditum esse?” So also Plato's ὦ 'γαθέ.
 The meaning is: if you were, not to say a native of Rome, but even anything else than what you are, your grinning would be more decent, though yet objectionable enough; but from a Spaniard it is utterly nauseating. The instances cited are not chosen because of any especial qualities, but as types of Italian provincials from near and far, and the descriptive adjectives are therefore but formal epithets.
 parcus: frugal.
 obesus: the monuments of the Etruscans show them to have been a short and thick-set people.
 vester: i.e. the teeth of Egnatius as representative of those of his countrymen.