Career
He was ordained as priest on February 19, 1933. In 1954 he was appointed by Pope Pius XII as apostolic prefect of Spanish Sahara and Ifni. He served as the apostolic prefect of Western Sahara until 1994, when he was succeeded by Acacio Valbuena Rodríguez, although he remained as Prefect Emeritus of Western Sahara.
After the 1975 occupation of Western Sahara by Morocco Erviti spent 19 years in the Sahrawi refugee camps.