*Senatorial and imperial provinces.* As we have seen the provinces were divided into two classes, senatorial or public and imperial or Caesarian, corresponding to the division of administrative authority between the Senate and the princeps. The general principle laid down by Augustus that the garrisoned provinces should come under the authority of the princeps was adhered to, and consequently certain provinces were at times taken over by the latter in view of military necessities while others were given up by him to the Senate. As a rule newly organized provinces were placed under imperial governors, so that these soon came to outnumber the appointees of the Senate. Eventually, as has been observed in connection with the history of the civil service, the public provinces passed completely into the hands of the princeps. *Administrative officials.* The governors of the senatorial provinces were entitled proconsuls, even if they were of pretorian rank. However, Asia and Africa were reserved for ex-consuls. Following the law of Pompey, a period of five years intervened between the holding of a magistracy and a promagisterial appointment. Each proconsul was assisted by a _quaestor_, and by three propraetorian _legati_ whose appointment was approved by the princeps. The imperial governors were of two classes, _legati Augusti_ and procurators. In the time of Hadrian there were eleven proconsuls, twenty-four _legati Augusti_ and nine procurators, besides the prefect of Egypt. The subordinates of the _legati Augusti_ were the legates in command of the legions, and the fiscal procurators. The procuratorial governors, at first called prefects, were equestrians, and were placed in command of military districts of lesser importance which were garrisoned by auxiliaries only. An exception to this practice was made in the case of Egypt, which senators were forbidden to enter, and which was governed by a prefect who ranked next to the praetorian prefect and had under his orders a garrison of three legions. These governmental procurators had, in addition to their military duties, the task of supervising financial administration. The title _praeses_ (plural _praesides_) which was used in the second century for the imperial governors of senatorial rank, came to designate the equestrian governors when these supplanted the _legati_ in the latter half of the third century.