Vintage cased entomology Giant Horned Rhinoceros Beetle. The Rhinoceros Beetle (Dynastinae) is a sub species of the Scarab beetle, and they are native to many Asian countries (over 300 species are known to exist). These are the largest of all beetles and some species can grow upto 15cm long. This one measures approx 10cm and is a visually interesting specimen. Nicely cased and ready to display. One of a small collection of entomology creatures that we have recently acquired (see other listings).