Quintus Acilius Italicus

b] Legio XVII: Roman Legion at War

Good afternoon everyone, I am new to the forums, but a long time reader of the content of this site. What brings me here is a question I have tried to find the answer to for a long time, but have always come up empty handed. I have constuled Dr. Adrian Goldsworthy on the issue, and he was unable to give me an answer. There were six property based classes in Rome. The Senatorial Class which is usually said one had to have a networth of 1,000,000 sestertii to be a member. Below them were the Equites, and it is understood that one needed a worth of at least 400,000 sestertii to be considered part of this class. Then there are three other classes, which are defined in several sources such as "The Property Qualifications of the Roman" by H. Mattingly in the Journal of Roman Studies. Mattingly states that the three classes in question, the 3rd, 4th and 5th classes, were defined as 50,000 asses, 25,000 asses and 11,000 asses respectively. Then of course, the proletarii who were worth under 11,000 asses. In short, my question to you all is, what were the names of the classes Mattingly calls the 3rd, 4th and 5th classes, between the Equites and the Proletarii? I would appreciate any sources you feel may be helpful in my quest. Thank you greatly for your time.