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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.
A group of mud-cells, each stored with food for the single larva within, we once found concealed in a deserted nest of the American Tent caterpillar. Eumenes fraterna, which attaches its single, large, thin-walled cell of mud to the stems of plants, is, according to Dr. T. W. Harris, known to store it with Canker worms.
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