Studies On The Systematics Of The Alimentary Canal Of Some Species Of Tettigonioidea

The studies on the systematics of the alimentary canals of insects of Tettigonioidea which totally include six families, twenty genera and thirty-six species were analysised by using the external anatomy and scanning electron microscope, briefly discussing the relation between morphological characters of alimentary canals and feeding habits. The results are as follows:1. The alimentary canals include three parts: foregut* midgut and hindgut. The significant differences between different genera exist in the crop, proventriculus and gastric caeca of midgut. The restare less important in the taxonomy.2. Differences of morphological characters of alimentary canals between different sexes and different individuals: the results show that there exist certain differences among different sexes and even different individuals in the same species. The variances between sexes are more significanr than those of the individuals and they are less significant than the difference between interspecific .3. There are some obviously differences about the morphological characters of alimentary canals between different subfamilies, different genera and different species. And the relation between them is coincide with the relation shown in the traditional morphic classification.4. There is a very close relationship between morphological characters of alimentary canals and feeding habits. The studies can be quite helpful in researches on the relation between the different genus, as well as on the phylogeny. And it might be useful in insect control.5. The results of studies completely show that the morphological characters of alimentary canals which was used in identification of insect of Tettigonioidea, the relation of different species and classific leval is feasible. At the same time, the results also show that the combination of the morphological characters and other classifications would offera more scientific classificatory warranty for the studies on systematics of Tettigonioidea and other insects of different populations.