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They found the same 12 "families" of peptides and proteins in all the hymenopteran venoms analyzed.

Termites, Dr. Henderson said, “were the first animals to form societies,” starting down the communal path about 200 million years ago, some 50 million years earlier than the ants and their hymenopteran cousins, the bees.

Strong evidence in favour of Weismann's views does, however, at first sight seem to be furnished by social hymenoptera in other respects.

The butterflies, moths, and hymenoptera, are few in number, and almost all seem to be common European species, whose presence is explained by the same causes as those which have introduced the birds.

Leaving out of consideration the tubicolous annelidæ, the mussels and stone-boring molluscs, the weaving caterpillars, and finally spiders, even the non-social hymenoptera present, among many insects, examples of a very skilful adaptation of materials.