Abstract: Vespa bicolor is a kind of social insect in vespidae. Its biological habit research in northeastern Fujian Province shows: the female Vespa bicolor finishes its hibernation in the mist of May, and then finds a place to nidificate. Its haplometrosis takes 36 days to finish a 34- comb nest and the female wasp plays both roles of the worker wasp and the queen wasp. Its ova period lasts 3. 5~ 5. 5 d; its larva period lasts 10~ 12 d; its pupa period takes 10. 5~ 12. 5 d; its
development period needs 24~ 30 d ( it is closely related to temperature) . Daily outing frequency of the female wasp has close relation with the local weather: its maximum can reach 42 times, per time is 6~ 22 min;worker wasps begin their field work when they are out of dormancy for three days; and the female wasp stops going out and invests all its energy in laying eggs ( it only has a generat ion per year, they abandon their nests to hibernate in the mist of December). Parental generation living in groups and cooperat ing together contribute to Vespa bicolor??s existence and reproduction.

Key words: Vespa bicolor , biological habit, development , natural enemy insect