The morphology of the sex pheromone gland inDrosophila grimshawi

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Abstract
The morphology of a sex pheromone‐producing gland found in the abdomen of Drosophila grimshawi males was studied by light and electron microscopy. This gland, consisting of two intra‐anal lobes, contains cells that resemble those of other insect pheromone glands. However, in contrast to many other insect pheromone glands that release pheromone through the cuticle, cells of the intra‐anal lobes secrete into a canaliculi‐duct system that empties into the anal region. The liquid secretory product flows along the surface of the intra‐anal lobes and is brushed onto the substrate by fingerlike projections on the lobes' surfaces.