There are many wax glands which result in forming a turtle-like waxshell on the dorsal surface.
预蛹和蛹不再取食，虫体隐藏在白色的半透明蜡壳内。
2
By repeating technological tests and batch production tests for over a year, the fused silica was successfully used in the production of silica sol shell for low temperature wax precision casting.