Map of the geographic distribution of the 56 sampling sites of M. quadrifasciata. The white squares with black points indicate individuals of M. q. quadrifasciata, the black hexagons indicate individuals of M. q. anthidioides, the white squares indicate the individuals with continuous tergal stripes from northern Minas Gerais, and the white triangles indicate the specimens with continuous tergal stripes from Sergipe and northeastern Bahia. The grey area represents the geographical range of M. quadrifasciata as determined by Batalha-Filho et al. (2009). The dashed line represents the putative barrier to gene flow estimated with the software SAMOVA 1.0.