CLASS I. INSECTA: ORDER 3. HYMENOPTERA. 
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tliem away from the place. The patience, art, and industry displayed by this little creature in 
thus excavating a house for her offspring, are truly wonderful. When, by dint of unremitting 
industry, she has sunk a shaft of sufficient depth, she deposits at the bottom an egg and a hall 
of pollen, and then, having prepared some clay, she forms a partition above, at a proper distance, 
and on this deposits another egg and ball of pollen, making another partition of clay, and so on 
till the shaft or tunnel is divided into six or eight compartments, each with its egg and pollen 
for the future grub ; the task being at length completed, she covers the external entrance, and 
so blocks all safely in, leaving the rest to the operations of nature. The wood is not lined with 
any material, but is worked quite smooth and even. 
The Mining Bees, Andrenidoe, bore pits in sunny banks, to the depth of six or eight inches, ter- 
minating in a little chamber almost at right angles with the entrance. Both the tubular pit and 
chamber are very smooth, and in the latter is deposited an egg, with a ball of pollen for the grub. 
HORNETS AND WASPS AND THEIE STRDCTDRES. 
THE DIPLOPTERA. 
This terra is from the Greek dlplos, doubled, and ptera, wings, the species of this family having 
the wings folded longitudinally when they are at rest. The Common Wasp, Vespa vulgaris, 
