New data on the biology and morphology of Tunga penetrans (L., 1758) Jarocki, 1838 (Siphonaptera-Tungidae) are presented. In this paper is given a comparision between those points found at the literature with the new ones which have been pointed out, such as different aspects of the larval structural, a particular description of the egg-breaker, and morphobgical details of adults obtained by using scanning electron microscope. New data about evolution period are given.