A CANDIDATE RED CLOVER POLLINATOR OSMIA COERULESCENS (L.)
FRANK D . PARKER
A leaf-cutter bee, Osmia coerulescens, was able to increase its population when solely on red clover, and so pollinate this important crop plant. Seed yields from Osmia-pollinated plants averaged 440 kg/ha. Data on the sex ratio and the average number of cells produced are given. Mortality of overwintering adults was high.