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Updated: June 1, 2025
Darwin, a true judge, made no mistake about it. For an account of certain experiments which the author conducted on his behalf, cf. "The Mason-bees": chapter 4. My first results in particular left him very anxious.
The reader can easily follow my route on the ordnance-survey map; and he will see that the loop described measures not far short of five miles and a half. At the same time, Favier came and joined me at Font-Claire, by the direct road, the one that runs through Piolenc. He brought with him fifteen Mason-bees, intended for purposes of comparison with mine.
Change the two nests as often as you please and you shall see the two Mason-bees keep to the site which they selected and labour in turn now at their own cell and now at the other's.
Full-grown Cats can find their way home, in spite of the distance and their complete ignorance of the intervening ground. They have, in their own fashion, the instinct of my Mason-bees. A second point remains to be cleared up, that of the swinging motion in the bag. Are they thrown out of their latitude by this stratagem, are or they not?
Down the centre of each of its four faces runs a line of deeply-cut hieroglyphics, in whose cavities the wild mason-bees construct their mud-cells and store their honey. Nothing can exceed the beauty and distinctness of these carvings.
Thus Latreille's Osmia, together with the Three-horned Osmia, uses the spacious structures of the Mason-bee of the Sheds; she likes the magnificent cells of the Masked Anthophora; and she is always ready to establish herself in the cylinder of any reed lying flat on the ground. "The Mason-bees": chapter 10.
Thus it is ordained by the economics of the Halictus. An egg bent like a bow is laid upon the sphere. According to the generally-accepted rule, it now only remains to close the cabin. Honey-gatherers Anthophorae, Osmiae, Mason-bees and many others usually first collect a sufficient stock of food and then, having laid the egg, shut up the cell, to which they need pay no more attention.
The work dragged on slowly; and the materials found occupants from the first year. The Mason-bees had chosen the interstices between the stones as a dormitory where to pass the night in serried groups. The little Dominican disappeared with the loads of stones. I regret him: he would have been a charming neighbour. The Eyed Lizard I do not regret at all. The sand sheltered a different colony.
I had them there, at my house, under my eyes, at all hours of the day, as long as I wished. I was free to follow their actions in full detail and to carry out successfully any experiment, however long. Moreover, their numbers allowed me to repeat my attempts until I was perfectly convinced. The Mason-bees, therefore, shall supply me with the materials for this chapter also.
No two nests could present greater differences: one with its eight empty chambers and its spreading clay dome; the other with its single bare cell, at most the size of an acorn. Well, the two Mason-bees do not hesitate long in front of these exchanged nests, not three feet away from each other. Each makes for the site of her late home.
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