'Mardi Gras' was probably painted in the period 1925-30, when Guinness had absorbed all the influences of Fauvism and Cubism and was confident in her own depiction of the figure. In these fancy-dress figures are hints of Dufy and Marie Laurencin, but the artist's enjoyment in rendering the paint on canvas overrides any strict artistic theories or rigorous composition.
An oil painting showing several faceless figures. In the left background a figure in white, with a black hat and black diamonds dances, while in the right middle-ground a figure with a dark hat and top and wearing multicoloured diamond trousers. In the left and middle foreground two figures in dresses are dancing together.