Figure. A) Principal components analysis based on pairwise population chord distances. The Adedes aegypti mosquito population in the Netherlands is represented by a blue square, the Florida, USA, populations by red crosses, and all other populations by black circles. B) Neighbor-joining network based on chord distances. QLD, Queensland. Scale bar indicates nucleotide substitutions per site. C) Individual mosquito–based Bayesian cluster analysis (K = 11) of the Ae. aegypti mosquito samples from the Netherlands and 15 reference populations. Populations are labeled as follows: 1, the Netherlands; 2, Miami, Florida, USA; 3, Vaca Key, Florida, USA; 4, Conch Key, Florida, USA; 5, Palm Beach County, Florida, USA; 6, Houston, Texas, USA; 7, Coatzacoalcos, Mexico; 8, Pijijiapan, Mexico; 9, Dominica; 10, Bolivar, Venezuela; 11, Zulia, Venezuela; 12, Rayong, Thailand; 13, Prachuabkhirikan, Thailand; 14, Tahiti, French Polynesia; 15, Cairns, Queensland, Australia; 16, Townsville, Queensland, Australia.