In short, the mother is absolutely incapable of settling her eggs in the chamber of the mason bee.
With us, it is the converse: we know the way out of the mason bee's fortress, but we do not know the way in.
Such is the strange perforating machine that is to prepare an outlet for the feeble Anthrax through the mason bee's cement.
Moreover, she is absolutely powerless to penetrate the mason bee's fortress, powerless as a fluff of down against a rock.
The egg is not placed upon the victuals, it is not even laid in the mason bee's cell.
Her nymph differs from that of Anthrax trifasciata, the Anthrax of the mason bee, in possessing less powerful armor.
Not one of us had succeeded in seeing the big black Fly perching on the dome of the mason bee.
When made through the mason bee's walls, it is cylindrical, fairly neat and exactly of the animal's diameter.
It enters, finds itself in the presence of ample provisions, the larva of the mason bee.