Abstract: The size. shape. growing time egg hatching rate. number of nymphs of Ootheca of Blattella germanica and Periplaneta americana P.brunea. P. australasiae were observed and measured with eight microscope and SEM.The result showed that there was obviously different between Oothecae of Blattella germanica and 3 species of Periplaneta.But tkere was no difference among Oothecae of Periplanata americana P. brunea. P.australasiae.

摘要： 利用光镜和扫描电镜观察和测量了德国小蠊与美洲大蠊、褐斑大蠊、澳洲大蠊卵鞘的大小、形态、发育期、卵的孵化率及孵出的若虫数。结果表明，德国小蠊与另３种大蠊卵鞘有明显的差异，而另３种大蠊卵鞘相似。

关键词: 德国小蠊, 美洲大蠊, 褐斑大蠊, 澳洲大蠊, 卵鞘