There is a considerable interest in native bees as pollinating agents of alfalfa in Arizona to supplement honey bees. Collections of bees in alfalfa have been made during the past two years and there appears to be a relatively few species of native bees which are encountered. A key to the genera of the bees appears below with some information on the distribution and host plant records of some of the more important species.
Butler, G. D. Jr., "Native Bees Commonly Found in Alfalfa in Arizona" (1955). Bu. Paper 56.
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