A constable shall be allowed for serving a warrant or other process for the arrest of any person, issued by any magistrate or court, 50 cents; for traveling to make such service, going only, 15 cents per mile, and where an arrest has been made, 15 cents per mile return travel from the place of arrest to the place of return; for taking a prisoner to jail or to the house of correction, 15 cents per mile, going only; for serving a mittimus, 15 cents; serving a subpoena, 15 cents for each witness, and 15 cents per mile for the distance actually and necessarily traveled in going to make such service; for summoning a jury, 1 dollar; for attending the same, 1 dollar; for attending any court by order of the magistrate or officer before whom a trial or examination is being held, when not in charge of a jury, 2 dollars per day for each day and 1 dollar for each half day so actually attending. The board of supervisors of each county may allow such further compensation for the services of process and the expenses and trouble attending the same as they shall deem reasonable. For other services in criminal cases, for which no compensation is especially provided by law, such sum as the board of supervisors shall allow.