Locations of 37 V. maculifrons and 13 V. squamosa colonies collected in this study. All samples were obtained from the state of Georgia (inset, see also Fig. 1). Lines denote county boundaries within the state. The greatest pairwise distance between colonies exceeds 120 km and colonies of both species were sampled from overlapping regions.
Hoffman et al. BMC Evolutionary Biology 2008 8:239 doi:10.1186/1471-2148-8-239