Bolivia held a parliamentary election in May 1918, electing a new National Congress (for half the seats of the Deputies and 1/3 the seats of the Senators).
Congressional Elections results
The new senators: Juan María Zalles, PL (La Paz); Felipe Peredo, PL (Santa Cruz); Adolfo Trigo Achá, PL (Tarija); Ismael Arteaga, PL (Béni); Néstor Suárez, PL (Béni); Clodoveo Urioste, PL (Chuquisaca).
References
Bolivian legislative election, 1918 Wikipedia(Text) CC BY-SA