Caption:
Darwin's beetle, Grant's stag beetle or the Chilean stag beetle, Chiasognathus grantii 1, and European stag beetle, Lucanus cervus 2. Handcoloured steel engraving by William Lizars from James Duncans Natural History of Beetles, in Sir William Jardines Naturalists Library, W.H, Lizars, Edinburgh, 1835. James Duncan was a Scottish zoologist and entomologist 1804-1861.