1. The Diversity and Utilization of Coccinellidae in China.

2. At last, a key to larvae of coccinellidae from Gansu province are given.

3. The paper summarizes developmental history and achievements of systematics of Coccinellidae over 200 years, introduces the technique of molecular biology used in this field.

4. The 4 other main species of insect natural enemies were Coccinellidae sp. , Microvelia sp. , Paederus sp. Cyrtorrhinus sp, .

5. The larva and diet of phytophagous coccinellids indicate that that they are the most ancestral group of Coccinellidae evolving from ancestors like chrysomelids.