Figure 11 in The evolution of Bolbites onitoides (Coleoptera: Scarabaeidae: Phanaeini): its phylogenetic significance, geographical polychromatism and the subspecies problem

Figure 11. Geographical range of B. onitoides showing the differential distribution of the colour variants. It is indisputable that there is a strong correlation between colour and geographical provenance in the species: blue individuals are abundant at the western-half of the distribution, while red specimens are dominant at the eastern-half. Nevertheless, two kinds of intermediates – the discrete bicoloured and the gradual colour-blended – are found throughout the range of B. onitoides, but nowhere are they the dominant variant. Note that there is a zone of overlap between the distribution of red and blue variants in Paraguay and Argentina, and that three localities recorded red, blue and bicoloured individuals and a fourth recorded all four variants.