Comparative Study on Species Characters of Ceracris Walker

The grasshoppers of Ceracris Walker have been recognized as Oriental faunistic component. Seven species including three polytypic species of the genus were compared and analyzed based on the geographic distribution,morphometric characters and chromosomes of bamboo grasshoppers in detail. It was showed that the number of Ceracris species was reduced gradually from southern to northern China,and those species with long tegmina was replaced by the short one in the genus from southeast to northwest in China. Seven species (subspecies) of Ceracris distributed in Yunnan Province,where can be considered as the distribution center of bamboo grasshoppers. The genus Ceracris displayed the chromosome number 2n ♀=24 (2n ♀=23),that was the same with alive original bamboo plants existed the lowest ploidy. The interspecies difference in location of X chromosome of these grasshoppers was very distinct. Otherwise,the standards have been indicated at first to mark types of bamboo grasshoppers based on morphometric characters.