CU of pollen grains of prickly pear flower. ECU of "pollen study". ECU of pollen grains. CU of bee leaving flower. CU of bee flying from flower. SLOW MOTION CU of pollen on legs of bee entering nest. CU of bee depositing pollen. MS of bee (bombylius species) flying; parasitic fly. CU of bee flying, depositing eggs. HA of bee flying, depositing eggs. MS of bee flying, hovering. CU of female diadasia bee sealing hole with turret. CU of female bee covering hole. (223)