Arthropods are organisms that have segmented body (i.e., head, abdomen, thorax), jointed tarsas, and antennae. Arthropods include insects, spiders, mites, centipedes etc.
Beneficial arthropods play roles in our environment that are recognized as being beneficial to humans. These arthropods include predators, parasitoids, and pollinators.
For more information on Beneficial Insects, see a well-illustrated WSU Bulletin prepared by