Arthropods are the earth’s most diverse organisms. Over 60% of all known living species, both plant and animal, are arthropods—insects, spiders, mites, crustaceans, and related groups. The insects account for over half of all species described thus far worldwide, and they are the dominant form of life in terrestrial environments. There are perhaps 35,000 or 40,000 known species of arthropods recorded from Arkansas, and it is still not uncommon to find species here that are unnamed and new to the scientific world.