County treasurers in counties of the first class, from and after the effective date of this act, shall cease to be agents of the Commonwealth, any other provision of any act of Assembly to the contrary notwithstanding, for the collection of mercantile license taxes, auctioneers', brokers', agents', and factors' license taxes, license fees payable by persons keeping for profit shooting galleries, shuffleboard rooms, billiard or poolrooms, bowling alleys, and similar alleys, and places by the owners or lessees of places of amusement, by hawkers and peddlers, by owners of dogs, by persons operating or keeping kennels, by applicants for fishing licenses, hunters' licenses, and all other taxes or fees payable to the Commonwealth which it is now their duty to collect, but in all other respects such treasurers shall continue to collect such taxes, fees, license taxes, and license fees as heretofore, and to exercise all of the powers now conferred upon them by law.