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 features a series of detailed anatomical drawings of various beetle species, showcasing their distinct physical characteristics. Each beetle is labeled with a corresponding number, providing reference points for specific features such as antennae, legs, and elytra. Surrounding the central beetles are additional diagrams illustrating close-up views of particular body parts, allowing for a comprehensive study of their morphology. The meticulous attention to detail highlights the diversity and complexity of beetle anatomy, making it a valuable resource for entomologists and enthusiasts alike.