Wells provides the following caption for his figure 7.2:

Discrepancies in peppered moth distribution

Locations in the United Kingdom of some descrepancies that didn't fit the classical story. (a) Manchester, where the proportion of the melanics was never as high as theory predicted; (b) East Anglia, where melanism was hight despite lichen-covered tree trunks; (c) South of latitute 52 degrees North where melanism increased after the introduction of pollution contrel; (d) The Wirral peninusla, where melanism becan decreasing before lichens returned to the trees.

Return to article.