摘 要：丝带凤蝶(Sericinus montelus Gray)是一种具有较高观赏价值的昆虫，存在季节多型现象。为明确其季节多型的科学划分依据，利用自动计算机辅助设计软件对丝带凤蝶长沙种群野外成虫的翅面积、尾突长度及面积、翅红斑面积进行测量，分析各世代成虫上述特征的差异性。结果显示，春型成虫的翅面积、尾突长度和相对面积均显著低于夏型成虫，而其前翅红斑相对面积显著大于夏型成虫。另外，春型雄成虫的后翅反面总红斑及臀角区红斑的相对面积显著高于夏型雄成虫，但是雌成虫并无显著性差异。以上结果表明丝带凤蝶的季节多型现象存在性间差异；前、后翅面积，后翅尾突长度及相对面积，前翅红斑相对面积是区分丝带凤蝶不同季节型的主要指标；而后翅反面红斑相对面积及臀角区红斑相对面积则是区分雄成虫季节多型的重要指标。

Abstract: Sericinus montelus Gray is a valuable ornamental insect species, and has two seasonal morphs. Here, the areas of wings, fantails, and red spots of S. montelus of Changsha population were measured by using Autodesk computer-aided design software, and compared between different seasonal morphs, so as to establish a systematic standard for distinction between the adult morphs. Results showed that wings and fantails were smaller, but the relative areas of forewing red spots were bigger in spring-morph adults than summer-morph adults. In addition, wing area varied significantly between different generations of summer-morph adults. Interestingly, the relative areas of red spots in back of hindwings and anal angles of spring-morph males were significantly greater than those of the summer-morph males, but no significant difference existed in females, suggesting that seasonal polymorphism may express differently between sexes in S. montelus. In general, areas of wings, fantails, and red spots in forewings are primary morphological indications for distinction between spring- and summer-morphs of S. montelus, while relative areas of red spots in back of hindwings and anal angles can be used as indications for males.