Ultrastructural Study On Morphology Of Nine Species Of Scale Insects(Hemiptera:Coccoidea)

The ultrastructure of wax glands and their secretions are studied for5felted scale species in3genera (Kuwania parva Maskell, K. betula Wu, Cryptococcus fagisuga Lindinger, C. ulmi Tang et Hao and Eriococcus nematosphaerus Hu et Xie)(Eriococcidae) and4mealybug species in4genera (Antonina socialis Newstead, Nesticoccus sinensis Tang, Balanococcus takahashii McKenzie and Heliococcus bohemicus Sulc)(Pseudococcidae) by using the techniques of scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The other important morphological characters on classifiction are also studied by scanning electron microscopy(SEM).The results are as follows:1. The ultratructure of the wax glands and their secretion in9species of scale insects are described and photographed. The results show that the wax glands such as discal pores, tubular ducts and spines and their secretion of them all have variation.2. The ultratructure of other important morphological characters of nine species of scale insects are descripted in detail. Some new morphological characters are found by SEM, such as the pore plates in Cryptococcus ulmi, which are hard to be seen by using the optical microsope..3. The cytological characteristics of5wax glands in Eriococcidae are studied by TEM. Of which2kinds of big dicoidal pores are descripted for the first time.4. Based on results of the ultratructure of the wax glands and their secretion, the taxonomic status of Cryptococcus ulmi and so on are discussed.