In event a county being a member of such joint mosquito control commission shall fail or refuse, within a reasonable time, to issue and deliver to the president of such joint mosquito control commission a valid warrant in payment of its proportionate part of such expenses, the other county or counties being members of such joint mosquito control commission shall have the right, upon written notice to the president of the board of supervisors so in default, to eliminate such default county from membership in such joint mosquito control commission.