Phylogenetic tree inferred by ML from the combined data set with a reduced number of outgroups. The identical topology with similar branch lengths resulted from Bayesian analysis of the same data. Numbers above branches indicate bootstrap support counted in minimum evolution analysis under the same model of substitution used in ML analysis (values >50 shown). Numbers under the nodes indicate Bayesian posterior probabilities. Vertical lines beside taxon names correspond to Papilio sections sensu Munroe (1961).