A detail from a roman pavement mosaic from the second half of the 4th century A.D., Carthage, in the British Museum, according to
London, England: British Museum: section of Months and Seasons pavement mosaic. She appears to be one of the Seasons, perhaps Spring or a wheat-sheaf crowned Summer.
"The Allegories of the Months in Classical Art," by Doro Levi;
The Art Bulletin, Vol. 23, No. 4 (Dec., 1941), pp. 251-291 associates her with July.