The Nasonov scent gland of the worker honeybee lies on the dorsal surface of the 7th abdominal tergum and consist of a mass of large glandular cells wich secrete pheromone through 600 or so minute ducts into a groove or canal between the 6th and 7th terga. The Nasonov gland and canal is usually concealed by the overlapping part of 6th tergum and the bee exposes them by flexing the tip of its abdomen downward.