Francisco Ferreira de Aguiar (11 November 1930 – 22 May 2012), known as Chico Formiga or simply Formiga, was a Brazilian footballer and manager. Mainly a central defender, he could also play as a defensive midfielder.

Formiga had his playing career mainly associated with Santos. As a manager, he was in charge of top tier sides Santos, São Paulo, Corinthians, Cruzeiro and América Mineiro.

Shortly after retiring, Formiga remained at Santos to work in the club's youth categories. He took over the first team for the first time in 1978, winning the year's Paulistão, which ended only in 1979.^[1]

Formiga also worked at São Paulo between 1981 and 1982 before returning to Santos, where he was manager in another two periods.^[3] He was subsequently in charge of Corinthians,^[4] Cruzeiro, Portuguesa, Santo André, Catanduvense, Goiás and América Mineiro in his home country, aside from a period at Mexico's Universidad Guadalajara in 1990 and Japan's Oita Trinita in 1998.

In 2001, after being in charge of Palestra de São Bernardo in the previous campaign, Formiga returned to Peixe as a youth football coordinator.^[5] He left the club after a change in the organization chart.

Formiga died on 22 May 2012, aged 81, due to a heart attack.^[1][6]