Below are a few references on competitive interactions between Apis and
wild bee species.  Unfortunately, most of these are a bit out-of-date.
 
Tepedino, Vincent J. 1981.  The pollination efficiency of the squash bee
	(Peponapis pruniosa) and the honey bee (Apis mellifera) on summer
	squash.  J. Kansas Entom. Soc. 54(2): 357-377.
Schaffer, W.M., et al. 1979.  Competition, foraging energetics, and the cost
	of sociality in three species of bees.  Ecology 60(5): 976-987.
Free, J. B. 1968.  The foraging behaviour of honeybees (Apis mellifera) and
	bumblebees (Bombus, sp.) on blackcurrant, raspberry, and strawberry
	flowers.  J. Applied Ecology 5:157-168.
Johnson, L.K. and S.P. Hubbell. 1975.  Contrasting foraging strategies and
	coexistance of two bee species on a single resource.  Ecology 56:
	1398-1406.
 
Hope this is of some use.
 
					Gene Spears
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