关键词: 马尾松毛虫蛾, 触角, 毛状感受器, 嗅觉化学感受器, 性外激素感受器

Abstract: The male pine caterpillar moth Dendrolirnus punctatus (Walker) hasa pair of feather-like antennae. The trichoid sensilla are arranged on the inner side (windward side) surface of the antennal stem and branch in each flagella segment. Each trichoid sensillum consists of a cuticular hair, three sensory neurons and three auxiliary cells–thecogen, trichogen and tormogen cells which are arranged in concentric array and serve as the envelope of the neurons. The hair wall is penetrated by many pores. The lumen of the hair is filled with sensillum fluid within which the dendrites of the neurons are immersed. As having proved by single cell recording in the insects of the same family, most likely the trichoid sensillure might possibly be responsible for perception of female produced sex pheromone and thus for the orientation in mating.

Key words: Pine caterpillar moth, antenna, trichoid sensillum, olfactory chemoreceptor, sex pheromone receptor