Beetles, 19th-century artwork. The large beetle at lower centre is the Chilean stag beetle (Chiasognathus grantii). It is also known as Darwin's beetle, as it was collected by Charles Darwin during his voyage on HMS Beagle (1831-1836). Artwork from 'Encyclopaedia Metropolitana', an encyclopedia published in London between 1817 and 1845. Thirty volumes were issued in 59 parts, with 22,426 pages and 565 plates. This plate is dated 1834.