The prosperity of the humble-bees never exceeds a certain limit, their laws are ill-defined and ill-obeyed, primitive cannibalism and infanticide reappear at intervals, the architecture is shapeless and entails much waste of material; but the cardinal difference between the two cities is that the one is permanent, and the other ephemeral. For, indeed, that of the humble-bee will perish in the autumn; its three or four hundred inhabitants will die, leaving no trace of their passage or their endeavours; and but a single female will survive, who, the next spring, in the same solitude and poverty as her mother before her, will recommence the same useless work. The idea, however, has now grown aware of its strength. Among the humble-bees it goes no further than we have stated, but, faithful to its habits and pursuing its usual routine, it will immediately undergo a sort of unwearying metempsychosis, and re-incarnate itself, trembling with its last triumph, rendered all-powerful now and nearly perfect, in another group, the last but one of the race, that which immediately precedes our domestic bee wherein it attains its crown; the group of the Meliponitae, which comprises the tropical Meliponae and Trigonae. {108} Here the organisation is as complete as in our hives. There is an unique mother, there are sterile workers and males. Certain details even seem better devised. The males, for instance, are not wholly idle; they secrete wax. The entrance to the hive is more carefully guarded; it has a door that can be closed when nights are cold, and when these are warm a kind of curtain will admit the air. But the republic is less strong, general life less assured, prosperity more limited, than with our bees; and wherever these are introduced, the Meliponitae tend to disappear before them. In both races the fraternal idea has undergone equal and magnificent development, save in one point alone, wherein it achieves no further advance among the Meliponitae than among the limited offspring of the humble-bees. In the mechanical organisation of distributed labour, in the precise economy of effort; briefly, in the architecture of the city, they display manifest inferiority. As to this I need only refer to what I said in section 42 of this book, while adding that, whereas in the hives of our Apitae all the cells are equally available for the rearing of the brood and the storage of provisions, and endure as long as the city itself, they serve only one of these purposes among the Meliponitae, and the cells employed as cradles for the nymphs are destroyed after these have been hatched.*