SCANNING ELECTRON MICROSCOPIC OBSERVATION ON EGG-BURSTERS OF TERRESTRIAL HETEROPTERA

REN SHU-ZHI(Department of Biology, Nankai University, Tianjin)Guo SHU-HUA ZHOU XING-DI(Test and Computation Center, Nankui University, Ttanjin)

terrestrial bug--egg-burster--scanning electron micrgram

The fine structure of egg-bursters of over 50 terrestrial bugs were observed with scanning electron microscope; they belong to Pentatomidae, Plataspidae, Coreidae, Berytidae, Aradidae, Stenocephalidae, Lygaeidae, Pyrrhocoridae, Anthocoridae and Reduviidae. The egg-burstars can be grouped into three types according to the taxa Pentatornorpha, Coreiomorpha and Cimicomorpha. The former two types are usually "T" or "Y"-shaped, notably in species with thick corion. Pentatomidae and Plastaspidae have more strongly sclerotized egg-bursters than Lygaeidae and Pyrrhocoridae which have thinner corion. The third type is conspicuously different from both of them in shape and structure. In Pentatornorpha marked difference exists in chorion sculpture and shape of egg-bursters among the genera such as Scotinophara, Nezara, Iphiartua and Pitcdia. Generally, the fine structure of the egg-bursters is related to the structure and thickness of chorion and its way of splitting.