In this way are formed, not true societies, there being no concerted effort to a common end, but at least gatherings where the sight of other Sphegidæ no doubt animates the labour of each. In fact, one can notice between these small tribes, sprung from one and the same stock, and the solitary miners, a difference in activity, recalling in one case the emulation of a populous workshop, and in the other the dulness of labourers in the tedium of isolation. For the animal as well as man activity is contagious, and excited by its own example. Let us sum up. Where there is a moderate weight for the spoiler, it is possible to carry it on the wing for a great distance, and then the Hymenopteron can arrange the burrows at pleasure, choosing by preference its birthplace. From this preference of the birthplace results an agglomeration—a coming together of insects of the same species, whence arises emulation in their work. This first step towards social life is the result of easy journeys. Is it not so with man? excuse the comparison! Men, where ways are bad, build solitary cottages, while where there are good roads, they collect in populous cities, served by railroads, which, so to say, annihilate distance; they assemble in immense human hives called London or Paris. The Languedocian Sphex has quite another lot. Its prey is a heavy ephippiger—a single morsel representing the whole sum of provender amassed by the other predatory insects bit by bit. What the Cerceris and other strong-flying insects do by dividing their labour is accomplished by a single effort. The weight of the prey rendering flight impossible, it must be brought home with all the delays and fatigue of dragging it along the ground. This one fact obliges her to accommodate the position of her burrow to the chances of the chase: first the prey and then the dwelling. Hence no rendezvous at a general meeting-place; no living among neighbours, no tribes stimulating themselves by mutual example—only isolation where chance has led the Sphex—solitary labour, unenthusiastic, though always conscientious. First of all prey is sought, attacked, and paralysed. Then comes making the burrow. A favourable spot is chosen as near as possible to that where lies the victim, so as to abridge the toil of transport, and the cell of the future larva is rapidly hollowed to receive an egg and food as soon as possible. Such is the very different method shown by all my observations. I will mention the chief of them.