4Michener C D, Grimaldi D A, The oldest fossil bee: Apoid histo- ry, evolutionary stasis, and antiquity of social behavior[ J~. Proc Natl Acad of Sci, 1988, 85(17) : 6424-6426.
5Bolmgren K, Eriksson O, Linder H P. Contrasting flowering phe- nology and species richness in abiotieally and biotically pollinated angiosperms [ J ]. Evolution, 2003, 57 (9) : 2001 - 2011.
6Wilson P, Thomson J D. Heterogeneity among floralvisitors leads to discordance between removal and deposition of pollen [ J ]. E- cology, 1991, 72: 1503-1507.
7Michener C D. The bees of the world [ M ]. 2M ed. Baltimore, Md: Johns Hopkins University Press, 2007.
8Matthew G, Alexander B, Athula A, et al. Attractive and defen- sive functions of the ultraviolet pigments of a flower( Hypericum caiycinum) [J]. Proe Natl Acad of Sci, 2001, 98(24) : 13745- 13750.
9Ollerton J, Alarcen R, Waser N M, et al. A global test of the pollination syndrome hypothesis [ J ]. Ann of Bot, 2009, 103 (9) : 1471-1480.
10DOtter S, Vereecken N J. The chemical ecology and evolution of bee-flower interactions: a review and perspectives. The present re- view is one in the special series of reviews on animal-plant interac- tions[J]. Canadian Journal of Zoology, 2010, 88 (7) :668-697.
