1976] Waddington — Foraging Patterns of Halictid Bees 
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Literature Cited 
Bernstein, R. A. 
1975. Foraging strategies of ants in response to variable food density. Ecology, 
56:213-219. 
Cody, M. L. 
1971. Finch flocks in the Mohave Desert. Theor. Pop. Biol., 2: 142-158. 
Frankie, G. W., P. A. Opler and K. S. Bawa. 
1974. Foraging behavior of solitary bees: Implications for outcrossing of a 
neotropical forest tree species. (Unpub. m.s.). 
Heithaus, E. R., P. A. Opler and H. G. Baker. 
1974. Bat activity and pollination of Bauhinia pauletia : Plant-pollinator 
coevolution. Ecology, 55: 412-419. 
Kalmus, H. 
1953. The clustering of honeybees at a food source. Brit. J. Anim. Behav., 
2: 63-71. 
PlELOU, E. C. 
1969. An Introduction to Mathematical Ecology. New York: Wiley-Inter- 
science. 286 pp. 
Ricklefs, R. E. 
1973. Ecology. Newton, Massachusetts: Chiron Press. 861 pp. 
Rohlf, F. J. and R. R. Sokal 
1969. Statistical Tables. San Francisco: W. H. Freeman and Company, 253 pp. 
Sokal, R. R. and F. J. Rohlf 
1969. Biometry. San Francisco: W. H. Freeman and Company. 776 pp. 
Ward, P. 
1965. Feeding ecology of the black-faced dioch Quelea quelea in Nigeria. 
Ibis, 107: 173-214. 
