I return when the harvesting is in full swing, between eight o'clock and twelve. There is now, as the Halicti go in or out, a succession of prompt withdrawals to open the door and of ascents to close it. The portress is in the full exercise of her functions. In the afternoon, the heat is too great and the workers do not go to the fields. Retiring to the bottom of the house, they varnish the new cells, they make the round loaf that is to receive the egg. The grandmother is still upstairs, stopping the door with her bald head. For her, there is no siesta during the stifling hours: the safety of the household requires her to forgo it. I come back again at nightfall, or even later. By the light of a lantern, I again behold the overseer, as zealous and assiduous as in the day-time. The others are resting, but not she, for fear, apparently, of nocturnal dangers known to herself alone. Does she nevertheless end by descending to the quiet of the floor below? It seems probable, so essential must rest be, after the fatigue of such a vigil! It is evident that, guarded in this manner, the burrow is exempt from calamities similar to those which, too often, depopulate it in May. Let the Gnat come now, if she dare, to steal the Halictus' loaves! Let her lie in wait as long as she will! Neither her audacity nor her slyness will make her escape the lynx eyes of the sentinel, who will put her to flight with a threatening gesture or, if she persist, crush her with her nippers. She will not come; and we know the reason: until spring returns, she is underground in the pupa state. But, in her absence, there is no lack, among the Fly rabble, of other batteners on the toil of their fellow insects. Whatever the job, whatever the plunder, you will find parasites there. And yet, for all my daily visits, I never catch one of these in the neighbourhood of the summer burrows. How cleverly the rascals ply their trade! How well aware are they of the guard who keeps watch at the Halictus' door! There is no foul deed possible nowadays; and the result is that no Fly puts in an appearance and the tribulations of last spring are not repeated. The grandmother who, dispensed by age from maternal bothers, mounts guard at the entrance of the home and watches over the safety of the family, tells us that in the genesis of the instincts sudden births occur; she shows us the existence of a spontaneous aptitude which nothing, either in her own past conduct or in the actions of her daughters, could have led us to suspect. Timorous in her prime, in the month of May, when she lived alone in the burrow of her making, she has become gifted, in her decline, with a superb contempt of danger and dares in her impotence what she never dared do in her strength.