Abstract
The writer and his co-worker (1959) described the larva of chrysomelid-beetle attacking the root of rice plant under a scientific name of Donacia simplex FABICIUS.
Recently Dr. Michio Chûjô kindly suggested me that the scientific name the writer adopted was misused and the correct one should be Plateumaris sericea LINNÉ.
The 8th abdominal segment of the female of Plateumaris sericea LINNÉ is very hard, dark brown and shows peculiar form. The tergite tongue-like, somewhat smaller than sternite. The sternite shovel-like and the terminal sharply pointed.
It seems that the 8th abdominal segment of the female has a special usage in oviposition and the oviposition-habit of the species differs remarkably from that of other groups.
