Wikipedia
Buteshire was a county constituency of the House of Commons of the Parliament of Great Britain from 1708 to 1801 and of the Parliament of the United Kingdom from 1801 to 1918.
From 1708 to 1832 Buteshire and Caithness were paired as alternating constituencies: one of the constituencies elected a Member of Parliament (MP) to one parliament, the other to the next. The areas which were covered by the two constituencies are quite remote from each other, Caithness in the northeast of Scotland and Buteshire in the southwest.
From 1832 to 1918, Buteshire was represented continuously by its own MP.
Before the Act of Union 1707, the barons of the shire of Bute elected commissioners to represent them in the unicameral Parliament of Scotland and in the Convention of Estates. After 1708, Buteshire and Caithness alternated in returning one member the House of Commons of Great Britain and later to the House of Commons of the United Kingdom.