锯天牛和狭胸天牛成虫发音器的超微形态研究

Study on the Superform of the Pars Striden of Adult Beetles of Prionus insularis and Philus antennatus

利用扫描电镜观察了锯天牛ＰｒｉｏｎｕｓｉｎｓｕｌａｒｉｓＭｏｔｓｃｈ和狭胸天牛Ｐｈｉｌｕｓａｎｔｅｎｎａｔｕｓ（Ｇｙｌｌｅｎｈａ１）成虫发音器结构。结果表明，两种天牛成虫都不发音，但其发音结构大不相同。锯天牛发音部位狭长，具许多乳突状结构；而狭胸天牛发音部位呈梯形，具明显的条纹状发音齿，纵沟后端具发音齿向外突出的特殊结构。比较形态学可见：狭胸天牛的发音器结构比锯天牛的更为进化，这亦是把狭胸天牛从锯天牛亚科中分离出的依据之一。

Results of observations show that neither of the adult Philus antennatus(Gyll)and Prionus insularis Motsch can produce sound, but their structures of stridulation arequite different.The pars striden of Prionus insularis Motsch is narrow and long,and hasmany outstanding structures.However the pars striden of Philus antennatus(Gyll.)istrapezoid,and has many files,the rear of the groove has special structures with the filesprotractting upward.ResuIts from comparison show that the organs of stridulation ofPhilus antennatus(Gvll.)is evolutiver than those of Prionus insularis Motsch.