was praetor in B. C. 43, and was sent by the senate into Picenum to levy troops, in order to resist Octavianus, when he marched upon the city in this year, in order to demand the consulship. Crassus was seized in a slave's dress, and brought to Octavianus, who did not punish him at the time, but afterwards included his name in the proscription. (Appian, App. BC 3.93, 94.) It is thought by some commentators that we ought to read Acilius instead of Aquilius. If this conjecture be correct, the Crassus mentioned above would be the same as the Acilius, who was included in the proscription, and whose escape is related by Appian. (B. C. 4.39.)