A technique for the examination of individual pollen loads collected by bees of the genus Andrena is described. A. varians has a definite preference for fruit-tree pollen and is therefore likely to be of gome value as a pollinator of plum, cherry, pear and apple in districts'' where it is to be found. A. haemorrhoa, armata and pu''escens, although frequently taking the pollen of these crop plants and of native Prunus[long dash]in pure or mixed loads [long dash]do not show the same high degree of preference and pollen constancy.