Pheromones, secreted by exocrine glands, play a key role in all of the social activities of termites. Sex pheromones are usually released by one of the imago to attract the opposite sex, whereas trail pheromones are used by workers to mark their path to food. The sternal gland is undoubtedly involved in the secretion of a trail pheromone, unlike the tergal glands and the posterior sternal glands, which are known to produce a sex pheromone. This book presents and discusses information regarding trail pheromones and sex pheromones in termites.