Arcana entomologica, or Illustrations of new, rare, and interesting insects, London, William Smith, 1845 i.e. 1841-1845, insects, arthropoda, entomology, classification, pictorial works, arthropod, The illustration showcases a series of intricately detailed beetles, each depicted from a different perspective. The top beetle displays a smooth, oval shape with distinct segmentation. The middle beetle features a more rugged appearance, characterized by its pronounced spines and texture variations on its elytra. The bottom beetle is shown with ornate patterns and distinct coloration, with its legs and antennae prominently extended. Accompanying each beetle are labeled markings denoting specific features or variations, contributing to a scientific exploration of these fascinating insects.