The passage is narrow, and is roofed over by the column, so that a bee, in forcing its way out, first rubs its back against the viscid stigma and then against the viscid glands of the pollen-masses.
Pasabidea estua da eta goialdetik zutabeak estaltzen du, halatan non erlastarrak, kanporako bidea urratzean, lehenbizi estigma liskatsuaren kontra igurzten duen bizkarra eta gero polen-masen guruin liskatsuen kontra.