What ladybug is the beetle with protuberant circle of division of elytrum eye ladybug is appellative, it is the small-sized insect with body fresh look, chang Jugong, black or yellow splash is nodded. Another namer is fat small, soubrette, potato ladybird. The oldest ladybug fossil specimen discovers at in Jurassic, it is the beetle of a small-sized, intimate long circle. The 1.0~16.0mm of imaginal body length of ladybug, bodily form shows short egg model to the circle, intense arch has body the reverse side, n normally compressed. Look from the reverse side, prothorax backboard is mixed elytrum radical ministry often is linked together cheek by jowl, normally width close. The head often embeds in prothorax, be covered completely by prothorax backboard sometimes. Prothorax backboard and elytrum the reverse side are smooth, or often have or rare or close petty undercoat. The whole world has the ladybug of more than 5000 kinds of above, chinese ladybug is phyletic already account has 1 0 subfamily 2 2 a group of things with common features belong to 530 kinds 83 times, foreign group distributings to the south of kind take absolutely advantage, in all 407 kinds, occupy 76.79 % . In Chinese animal division into districts, abound most with sort of Hua Na area again, in all 208 kinds, occupy 39.25% . Ladybug is completely abnormal insect, namely young period configuration and imago are completely different. Lifetime should experience 4 bug period: Egg, larval, aurelian with imago. After ladybug breeds in great quantities, can put field, help mankind kills aphid and Jie insect. Have profit very much to crop.