The term INDUSTRIOUS BUG can be summarized as an ANT that is hardworking and diligent. The crossword solution for this term is ANT, which is a small insect that is known for its hardworking nature. Ants are often seen carrying food back to their nests, working together in large groups, and building complex structures. They are also known for their ability to work long hours without rest. This makes them an ideal example of industriousness and hard work.